Humanure

Before building our house at the farm, it took Dev several months to nail down all the details involved in building a composting toilet for the Indian context. We have been using this composting toilet for over four years now. Here I share the history and details of this construction.

Developing An Understanding

A couple of decades ago, when we were living in California I remember reading somewhere “all of us are peeing and pooping in drinking water”. The blatant truth in this statement hit me really hard. I felt terrible about  what we were doing (or being forced to do). This understanding was weighing me down for sometime and slowly it receded into the background. Several years later I came across this quote by Joseph Jenkins:

“The world is divided into two categories of people: those who shit in their drinking water supplies and those who don’t.”

This was a wake-up call. Dev and I started reading “The Humanure Handbook” by Jenkins. (All the quotes in this article are from this book) Soon after reading this book we decided that we wouldn’t have a septic system in the house that we were planning to construct on the farm. Also, we had a self-imposed limit on the water (2000 liters per day for household and farm purposes) that we could pump from our bore well. We needed to conserve all the water we could and use it for growing trees. Thus a no-flush toilet idea appealed to us right away.

 “According to a composing toilet manufacturer, waterless composing toilets can reduce household water consumption by 150,000 liters per year. This is significant when one considers that only 3% of the Earth’s water is not salt water, and two-thirds of the fresh water is locked up in ice. That means less than one percent of the Earth’s water is available as drinking water. Why shit in it?”

Current Sewage System - A Nightmare

“Let’s assume the whole world adopted the sewage philosophy we have in the United States: defecate into water and then treat the polluted water. What would that scenario be like? Well, for one thing it wouldn’t work. It takes between 1000 and 2000 tons of water at various stages in the process to flush one ton of humanure. In a world of jut 6 billion people producing a conservative estimate of 1.2 million metric tons of human excrement daily, the amount of water required to flush it all would not be obtainable.”

"Our septic systems pollute groundwater; this is an undeniable fact ... Between 820 and 1460 billion gallons of this (water from the sewage systems) contaminated water were discharged per year into our shallowest aquifers. In the US, septic tanks are reported as a source of ground water contamination more than any other source.”

What about wastewater treatment plants or sewage plants?

These plants are basically huge septic tanks that collect excrement(floating in water) of a large population. Treatment plants use aerobic or anaerobic microbial digestion of the solids. Once the microbes do their job and the contents are allowed to settle down, we are left with solids (called sludge) and the waste water. Sludge is treated differently in different places -- benign to out-rightly harmful practices . “The water left behind is treated, usually with Chlorine, and discharged into a stream, river or other body of water.” Whatever happens to groundwater! In India, the fecal sludge is often emptied out into untreated water, agricultural fields or forests. This poses serious risk to the public and the environment.

The Human Nutrient Cycle

 

 

 

PC: The Humanure Handbook, by Joseph Jenkins

I found this excerpt on iharweb.org; it succinctly captures the mess we are in:

“humans are going through the elaborate process of mining and processing to manufacture fertilizers, applying them to crops, and then losing it all via wastewater. Lakes and streams, which receive an excess of nutrients from wastewater are suffering from serious ecological effects such as oxygen depletion and fish-kills. Also, synthetic fertilizer manufacturing is an energy-intensive industry and is expected to increase to feed an ever-growing population”.

Closing The Loop

 “Not all cultures think of human excrement in a negative way. For example, swear-words meaning excrement do not seem to exist in the Chinese language. Traditionally, there was nothing more valuable to a peasant than humanure.”

 "In China, the practice of composting humanure with crop residues has enabled the soil to support high population densities without loss of fertility for more than 4000 years. There certainly was no chemical fertilizer 4000 years ago. The practice of composting all waste (humanure, livestock manure, household organic residues, organic farm residues) yielded a rich manure". 

“Farmers of Forty Centuries” was a book written by Dr. F. H. King and published in 1910. Dr. King was interested in finding out how people could farm the same fields for millennia without destroying their fertility. He writes:

“One of the most remarkable agricultural practices adopted by any civilized people is the centuries long and well nigh universal conservation and utilization of all humanure in China, Korea and Japan, turning it to marvelous account in the maintenance of soil fertility ... mineral fertilizers so extensively employed in modern Western agriculture have been a physical impossibility to all people alike until within very recent years”.

Our Construction

One of our friends, Venetia Ansel, had built a composting toilet on their farm. She helped us understand the issues involved. After a series of discussions at home and some R&D, we arrived at a design that incorporates:

- a urine diverter

- a urinal (for men)

- a urine collecting tank, that receives urine from both the men's urinal and the urine diverter

- a granite-top bench that sits on top of a toilet chamber 

- a toilet chamber 

- an exhaust vent pipe from the chamber

Our Composting Toilet

Composting Toilet Bench

Technical Details:

• The granite-top bench has a "business" area and a wash bowl. The "business" area is basically an opening in the bench with a bucket underneath it. The opening is slightly bigger than a normal Western toilet seat. The height of this bench (38 cm) ensures that it can be used as a Western (sitting style) toilet or Indian (squatting style) toilet. We have a hand-crafted toilet seat, for Western use. 
• The urine diverter, installed in the front of the "business" area, separates urine from the solids. We got this fabricated. This is connected to a five liter can, that is placed outside the building. We dilute the collected urine and use it as a fertilizer. The urine diverter does its job irrespective of the user's position (sitting or squatting). It ensures that the bucket underneath doesn't get  much of the liquid. The user is oblivious of all these technical details. 
• The toilet chamber has an opening from outside the building. We have a metal gate here. We have used an old cycle tube to achieve an air-tight seal (to deter bugs). The floor of this chamber is sufficiently above the ground level, to prevent any water from getting in during heavy rain.
• The vent pipe, from the toilet chamber, is covered with mesh at the top and capped with a PVC 'T' joint
• A hand-crafted, inverted 'U' shaped, wooden platform sits on top of the wash bowl to enable easy washing
• A window with mesh keeps the place well ventilated

Usage

After every potty use, we gently scoot over to the wash bowl and use the health faucet (spray) situated on the wall behind us. To prevent any odour, the (solid) excrement needs to covered well. We use sawdust from the local saw mills as the cover material. We get our sawdust from timber-only mills (these mills don't process plywood). We have used crushed, dried leaves when we couldn't procure sawdust. 

This toilet wastes so little water -- hardly 5 liter, for a family of four for an entire day!

If a composting toilet is managed properly, it should be odour-free...these toilets should provide a suitable alternative to flush toilets for people who want to stop defecting in their drinking water".

Composting and  Pathogens

We do off-site composting. We have a 10 liter bucket, aligned to the center of the opening in the granite-top bench of our toilet. This bucket is placed on a wooden base, with castors. Once the bucket gets filled up, we use a long hook to drag it out of the chamber. We dump this on top of an (unfinished) compost pile. 

We add kitchen waste and farm's green waste to the same pile. We sometimes add the collected urine also, depending on the moisture level of the pile. The nitrogen in the urine balances the carbon in the sawdust. Before re-installing the bucket into the toilet chamber, we wash it and add sawdust to the bottom. This ensures that the contents of the bucket get cleanly dumped. This keeps the bucket fairly clean and uses very little water while washing.

Once the unfinished compost pile gets sufficiently big, we start the composting process. We let the pile cool down for a couple of months. We then use the end product -- dark, fluffy, earthy smelling humus -- to fertilize fruit trees. We have observed that the trees and bamboo close to the humanure compost pile absolutely thrive from the extra nutrition that they receive from this pile. We have not observed the same growth rate anywhere else in the farm.

"There are two primary factors leading to the death of pathogens in humanure. The first is temperature. A compost pile that is properly managed will destroy pathogens with the heat and biological activity it generates. The second factor is time ... Given enough time, the wide biodiversity of microorganisms in the compost will destroy pathogens by the antagonism, competition, consumption and antibiotic inhibitors provided by the beneficial microorganisms".

Feedback from our visitors

We have had visitors from all over India, the U.S. and London. The most common feedback that we have heard so far is "it is just like a normal toilet!" We are very happy to hear this. We have hosted many, many families and have had no problems. A friend who built his house recently remarked "how I wish I visited this place before building my house! I would have built a composting toilet too!" Surprised by the ease-of-use and odourless nature of the toilet, a friend from Bangalore said that she would recommend this design to anyone thinking about such a toilet.

Commercial Composting Toilets

There are many commercial composting toilets now. Eco-san toilets are used in many places in India. Clivus Multtrum USA has been in the market since 1964! BioLet toilets are being engineered and built in Sweden since 1972! "At least 21 different composting toilets were on the market in Norway alone in 1975".

Future

A no-flush movement is gaining momentum in Europe. People are waking up to the fact that the current way of flushing and polluting the environment is not a sustainable one. Just last week, the Sunday Times (UK) ran an article on how "Composting Loo" is becoming the new status symbol!

“we too will have to constructively deal with all of our organic byproducts eventually. We can put it off, but not forever”. 

”... human species must inevitably evolve ... flush toilets and bulging garbage cans represent well entrenched habits that must be rethought and reinvented”. 

-- Hema

 

The konnai story

In 2013, when we were new to Athimanjeri, there was no garbage dump here. I didn't really see a need for one as there was not much garbage. But in the following few years, this changed rapidly. We now have two 100 ton garbage pits that fill up in no time. This put me in touch with the stark reality -- just a handful of us making eco-friendly choices is not going to make a dent in the garbage produced.

When Corona was at its peak in 2020, I realized that this presented a unique chance for introducing cloth pads (an eco-friendly alternative to disposable sanitary napkins) in our village and town. I started making cloth pads with a small group adolescent boys and girls. My idea was to provide job opportunity locally and grow a few socially-responsible individuals who can carry this venture forward.

I wanted to keep the price low, to make it affordable for the people here. I priced them at ₹ 100, per pad. Armed with a bunch of our cloth pads, I started a campaign, in our town and nearby villages, about the financial and ecological implications of using disposable napkins. Whenever I had a captive audience I handed out free samples. Over the course of next eight months, I gained the following understanding about the lives of rural women and the various factors that are at play here:

• Cheap disposable pads are really cheap (₹ 5, per pad). Because of this highly subsidized rate, in many cases it makes very little economic sense to not use disposables.
  
• Women spend  ₹ 50 - ₹ 150 per month on disposable napkins
• Many of them don't change their pads since every pad costs money. They use their pads for 8 - 12 hours!
• Young girls, women in their 20's and 30's do not want to wash cloth pads. 
• Older women (40 and above) still use cloth
• Often a poor, semi-urban family shares their bathroom/toilet with other families. Soaking and washing cloth pads is not practical here. 
• Government schools in Tamilnadu offer free disposable pads for girls from 9th grade onwards. Their families are not spending on pads. The staff at these schools siphon a part of these pads to their homes. Thus their relatives also get free pads. 
• Government schools in Andhra Pradesh offer free pads for older girls. The girls toilets are equipped with incinerators. So these schools don't see how this can be an environmental pollutant.
• Women often develop allergies by using disposable pads, but they don't talk about that.
• Most women burn the used pads, only some bury them.
• Up to 10% of the women, between ages 25 and 35, have had their uterus removed for mysterious reasons.
  
• Interestingly, caste and class played a role in how menstruation could be talked about. The upper the caste or class was, the males in the family were not involved in the discussion.

A very small percentage of women were eager to try the cloth pads. Satisfied with our pads, they started spreading the word around slowly. This local market was clearly not enough if this venture had to provide a sustainable livelihood for the makers of these pads. There was a need to go beyond the tiny radius that we were operating in. Thus konnai was born in mid-2021, with the help and support of many of our friends. It is now a rural employment initiative providing a source of income to a small group of youth and women.

konnai's vision is to enable people make better choices for a better tomorrow. This includes providing high quality eco-friendly reusable products at reasonable prices; providing a healthy work culture for the makers where they and their families can thrive.

 

Other than cloth pads, we also make cloth bags, cloth diapers, changing pads, baby wipes and bibs. konnai is now online. We can receive online orders and receive payments through GooglePay. Please spread the word about konnai. Thank you!

 

 

-- Hema

Where Is "Away"?

Till I was fourteen, we didn't have a dustbin/trashcan at home. There were none at any of neighbours' places, none at school and none at any public place. Not because we were all poor and not able to afford them. It was because our lifestyles then didn't need any. We of course did produce "waste", but most of it was bio-degradable -- kitchen waste, house sweepings, paper wrappers, worn-out clothes etc. These were tossed out into the yard without much thought. And they all became a part of the soil life around us. All of the monthly grocery came wrapped in newspaper from the neighbourhood store.  Snacks were all home made. Grains were processed at home. We carried our bags when we went to shop. There was also occasional non-biodegradable waste such as light bulbs, medicine bottles, aluminum foil from the pill strips. This was also tossed out; there was so little of this waste that it didn't matter.

This was the case until 1988, not that long ago. But when I reminisce about these plastic-free days and talk about to it young people, they find it absolutely unbelievable. When plastic entered our everyday lives, garbage started getting generated. I saw people who were living zero-waste lives switch over to use-and-throw lifestyle without even noticing the change that had come about in their lives. Now pretty much everyone, in every corner of the world, throws away the garbage that they produce. But, where is this "away"?

Irrespective of where we live, there must be at least one dump yard close to us. The size of these dump yards (or landfills) are growing in most places that can't afford incinerators. Burning garbage is not anyway a great solution, because of the greenhouse gases that are emitted. When we moved to Athimanjeri in 2013 there was no dump yard here. Now we have a whopping 10000 cubic feet of garbage that is being constantly burnt. This dump yard used to be agricultural land; it was also providing food and shelter to animals; it has now been rendered utterly useless, dead and toxic. Now consider this happening at a much larger scale in populous cities. For example, there is a garbage mountain looming in the outskirts of Delhi in Ghazipur. This will soon be taller than the Taj Mahal, which is also man-made.

Ghazipur dump on the left and the Taj on the right
Courtesy: The Guardian

What about garbage that floats away or gets dumped into the oceans? Well, there is indeed a massive floating garbage called "The Great Pacific Garbage Patch". It covers an approximate surface area of 1.6 million square kilometers – an area three times the size of France!!  Here is a recent video of this.

A 2012 report states that this patch has increased 100-fold since 1970's. And since 2012 it has doubled.  We don't really need experts to give us data regarding garbage. All we need to do is look keenly around us; at all the options that have come up as norms (like plastic water bottles, plastic bags). The garbage we produce will be here for ages to come. The bitter truth is that we have enjoyed a relatively-decent planet and are leaving behind a trashy planet for our children. 

Now, please pause to let this truth sink in. There is a desperate need for us to empathize with the future generations. 

There is no "away". 

-- Hema

Green The Red: Sustainable Menstruation

 I was born in 1974. Fortunate I was, for that was a time when disposable sanitary napkins were not there. There was no such trash then. On the contrary babies born this year in India, are born into a country trashed with 432,000,000 disposable sanitary napkins every month. Not the babies' fault though! Not one bit. (Data Courtesy: Environmental Portal, Down to Earth, 2011) 

This data being a decade old, it would be safe to say that the current number is likely to be ten times more than that -- 4320 million disposable sanitary napkins in garbage in India, every single month!! If this astronomical number is not enough to stop us on our tracks I don't know what else could.

If all our ancestors were trashing the planet the same way we do now, we wouldn't have had the space to grow food and live well. We would be surrounded by mountains of the napkin trash that would take 500 - 800 years to decompose; or we would be breathing toxic air that had the emissions from incinerating those. We thankfully still have a reasonably good planet. There is an inherent contradiction when we worry about the future of our children and trash the planet where they will live. This planet is a loan that we have borrowed from the next generation. We need to hand it over to them at least in the way we found it.

After all women have been menstruating ever since the inception of our species. We are not the first ones to menstruate! Thus it does not give us the right to trash the planet. We are mothers, wives, daughters, care-takers, home-makers,  professionals. We are socially responsible citizens. We can't be trashing the planet.  Our convenience in using disposable napkins externalizes the environmental costs involved. If all those costs were to be added up, the cost of a disposal napkin would go up multi-fold and thus would become un-affordable. Cheap products, more often than not, have subsidies, hidden environmental costs and externalized costs, that are worth investigating.

The switch to a reusable cloth-pad or a cup is a good place to initiate meaningful conversations in the family. I have heard excuses of all kinds: "it is dirty", "I can't see blood", "I can't insert the cup", "I can't wash the pad" etc. We ought to remember that every time we come up with excuses and make things convenient for ourselves, we are ruining the planet for our children and their children. This is the bitter truth we have to face if we continue with the convenience of disposable napkins.

How did this transition come about? An elderly person in our village gave me a plausible explanation:
"We used to consider air, water, land, fire, space (the five elements of nature called pancha bhoota) as sacred and elders instructed us not to pollute these. These were worshiped as Gods. Later when Gods were moved to their abodes in the heaven, the sanctity of these five elements was lost. People didn't see the need to worship them."

Going back to nature worship or heightening one's social responsibility? 

Green The Red: Sustainable Menstruation 

-- Hema

The Third Curve: The End Of Growth As We Know It

I found this book to be one of THE most important reads because of its relevance to ALL of us living in this modern era, irrespective of who/where/what we are. It walks the readers through the process of how our Modern Industrial World has come about; it throws light on the math behind the fast-depleting resource -- petroleum; it analyses all the existing alternative energy options and concludes with a paradigm shifting note on rebuilding a post peak oil world. 

The Third Curve is written by Mansoor Khan. He lives on his organic farm called Acres Wild, in South India. Khan says that this book "examines the stark and unbridgeable disparity between the compulsions of exponential, economic growth and the energy limits imposed on us by the laws of geology, thermodynamics and the finiteness of the Earth". He says "this book is not about morality, justice, equality and environmental consciousness. It is about what is possible and what is not". All the graphs on this post are from Khan's website.

Khan says "The Modern World is obsessed with growth. We worship growth. Growth is our religion". He clarifies what "growth" means in this context. It is "NOT any old kind of biological growth, nor it is the kind of qualitative growth that makes us love our family and friends; growth in this context is reduced to a quantitative state".

Before we get to the Third Curve, we need to understand what the first two curves are. The First Curve, concept curve, is used to illustrate the growth of a given quantity. In Financial System, the concept curve shows the growth of money. Our financial system is based on ideas like:
- money is a TRUE representation of the value of goods and services
- money must grow with time by a factor of P%
- growth of money must compound
- compounding growth must be perpetual

This is where he introduces the term "Perpetual Exponential Quantitative Growth". "PEQG is a monster, overruling all other laws. This monster is the founding principle of Modern Economics".

The Second Curve is Bell Curve. The extraction of all natural resources obeys the Bell Curve. "The reality of the Modern Industrial World is energy and 60% of it comes from fossil fuels (Coal, Natural Gas and Oil). So fossil fuels are the most important component of our natural capital, and among them Oil in particular." Thus he focuses on "Oil" whenever he refers to the energy usage and production. As the Economy of a nation or the World grows, so does its energy usage. Being a natural resource, Oil obeys natural laws, especially the ones of Geology.

In the real world, our concept is "Money Growth" and the reality that makes it possible is Oil Production. "Oil is the defining factor for Industrial Growth and therefore Money Growth". Khan uses the global money supply graph to illustrate how the Industrial growth is occurring. This is an exponential growth. And this growth is based on the "Reality" of Oil Production, which being a resource the graph is bell shaped. When these two curves are juxtaposed, we can see how impractical it is to sustain the current Industrial world in the current fashion. The juxtaposition of the curves, yields three distinct phases of our economy. 

Phase 1 (Paradise Times: 1900 - 1960's): 

Here the Money and Oil curves are running fairly parallel to each other.We were able to draw Oil from the Earth at an exponential rate; this part of the Bell curve does go up more or less exponentially. This made us believe that the sky was the limit.

Phase 2 (1970's - mid 2000): 

The curves start moving away from each other. Money keeps going up, whereas Oil, being a natural resource, starts slowing down. "This was the beginning of the Eco-Collapse. This breakdown was manifested in the first signs of species getting extinct, forests disappearing, fisheries declining, rivers drying, aquifers depleting etc." We were clearly "exceeding the carrying capacity of the Earth's ecosystems". Our financial system was being propped up, because there was a growing hollowness under its surface. This was a time to rethink Growth. But it didn't happen. Instead "every effort was made to deny reality and to perpetuate growth".

Phase 3 (mid 2000 - present): 

According to the undeniable Bell Curve graph, "the future path in Phase 3 seems steeply downhill with the current economic paradigm". This is where he introduces "Peak Oil".

"Peak means half gone". Our Modern Industrial Society is heavily dependent on this limited non-renewable resource that we have reached the peak of. From this point on, there is a more or less steep decline in the resource curve. Now the future is highly dependent on the choices we make.  Unless we make new choices a collapse is inevitable. 

What IS Oil and why is it THIS precious? 

"150 million years of the Sun's energy, half gone in 150 years. This is equivalent to spending a million times your salary every month". That clearly can't work! "The world will not disappear because of Peak Oil but we will find ourselves in a considerably different world with a new set of economic rules, in fact, an inversion of the rules of Economics, Shrinkage instead of Growth".

Our current world is built with oil, runs on oil and is maintained by oil. Let us take our food system to illustrate this. Today's mono-cropping systems use oil at each of the following step: ploughing, spraying pesticides, fertilizers, cropping, thrashing, cleaning, packing, storing, transporting, (in some cases)
refrigerating. "Remove oil from this network and the complete food system will collapse". Personally we have seen this in our village.The tragedy is multi-fold in an agrarian place like this -- the culture around food has collapsed too. Each stage of food growing called for a certain expertise and all of it was locally found. Now with the advent of industrial ways local expertise is fast disappearing and oil dependency is increasing. Professor Albert Bartlett of the University of Colorado at Boulder rightly said: "Modern agriculture is the use of land to convert petroleum into food". There is an extremely complex web of oil inter-dependencies. All the alternative energy options are themselves built using oil energy. Such is the uniqueness of oil.

Hubbert's Role:

Marion King Hubbert was a geoscientist working at the Shell research lab in Texas, in the early 1950s. He predicted that the rate of oil production resembled the Bell Curve. He did statistical analysis on data regarding Discoveries (of oil wells) Vs. Production of Oil, within the US. Based on his theory, he predicted that the US petroleum production would peak between the late 1960s and early 1970s. "Hubbert was met with scathing criticism at first. He was mocked and ridiculed". And indeed, US oil production did peak around 1971.

"This marked a new era in the US history that prompted a scramble for cheap oil outside its borders to keep the growth going". Now, let us look at the global data. We were at the peak of oil production around 2005. "The future shape is projected from past experiences, but the rate of decline obviously depends on our consumption patterns". The Oil Drum (http://theoildrum.com/node/5576) showed that 40 of the 54 oil producing nations had reached Peak Oil production. "The era of cheap oil is definitively over".

Okay, what do we do now? 

"Peak Oil is a predicament and not a problem. Problems have solutions but predicaments are a nature of reality and we have to cope with them. They do not have solutions. People have mistaken the finiteness of our planet and its resources as a problem." This is the crux of the matter.

In the next section of the book, Khan evaluates all the alternatives using five rules viz. Net Energy, Oil Dependency, Energy Density, Scalability and Oil Byproducts. He applies these rules to the entire gamut of energy options:

- Liquid fuel alternatives (bio fuel-Ethanol, tar sands, shale oil)

- Other fossil fuels (coal and natural gas)

- Electricity alternatives (solar, wind, hydro etc.)

He then presents the data to back up his case -- "alternatives can do nothing to save our paradigm of perpetual exponential economic growth".

Thus there is a pressing need to move beyond the two curves -- exponential and bell. Here he introduces the third curve which is a behavioural curve of the universe, the one that is "embedded in nature". This curve follows the rhythms of our primary energy provider, the sun. "Reliably it rises, peaks and ebbs only to rise again".  Growth in nature "was always meant to oscillate in gentle waves of highs and lows, following the sun's energy. The smaller oscillations of day and night were superimposed on larger oscillations of seasons and the even larger oscillations of solar cycles".

"Ever changing, yet ever remaining, in a narrow band of values. Nothing going to the sky and nothing going to zero".

"Return to the Third Curve is inevitable. Because that is the steady-state – the eternal rhythm of the universe. We have 2 paths to the Third Curve – denial or acceptance of peak oil". 

"The path through denial can certainly extend our moment at the top of the peak only to exacerbate our predicament leading to an eventual steep, and short chaotic collapse. Each attempt at flattening the curve to maintain status quo will result in a sudden sharp drop of collapse giving the descent a staircase shape". This is shown in the graph above in red.

"The path through acceptance can immediately start a smoother, longer and managed energy descent, which involves re-alignment of our economic paradigm, cultural beliefs, making sacrifices and bearing some degree of pain. This path will be gentler, less steep and give us time to adapt. It also entails a simultaneous understanding and movement towards the new world that is inevitable with a lower energy budget. We stand a much better chance of bypassing collapse and consciously shaping an unfamiliar but desirable future". This is shown in the graph above in green.

The last bit of the book dives in to the Transition -- "a structured and conscious way of moving safely from our present high energy-consumption state based on fossil fuels, towards a low energy-consumption state".   Tran­sition is based on principles such as rebuilding the soil, rebuilding the community and its resilience, growing local food, developing alternative and earth-friendly agriculture and encouraging local initiatives. Cuba's peak oil story at the end of the book shows that it is indeed entirely possible to make a meaningful journey, collectively as a community, to Transition down to the Third Curve.

"If Cuba could do it, so can any part of the world, provided we first recog­nize the new reality of shrinking energy and money and then adopt the principles of the Transition method".

 For further reading:

- "Collapse Now and Avoid the Rush" by John Michael Greer

- Charles Eisenstein's "Sacred Economics"

 

Light And Dark Matters

A few years ago, a disturbing realization came upon me and it was:

Homo sapiens is the only diurnal species that carries out normal daytime activities after sunset.

The discord created by this realization led me to understanding the health implications of altering our environment to suit our ever-changing comfort levels; and also to making changes in our lives to realign ourselves with natural cycles. In this blog post I will write about this journey. The only environmental factor I take into consideration here is light.

According to archaeological records, Homo sapiens started walking the earth nearly 200,000 years ago. We are still biologically the same as those initial men and women. But ever since the advent of artificial lighting, human race doesn't experience natural light and darkness the way it did for thousands of years. 

Thoughts and questions such as these bothered me deeply -- Artificial lighting is hardly a century old technology. What is a century or a few in geological time scales? Not even an insignificant blip! How can our evolutionary needs for light and darkness change in that short amount of time? Won't human body's mechanisms, that have evolved to take in natural light and darkness as their cues, go awry because of our modern ways of living? Natural light and darkness are free for everyone. But still how many actually meet the human body's requirement for these? I moaned for the terrible loss of natural light and darkness from most people's lives. 

First, some science: The color components of visible light include violet, blue, green, yellow, orange and red. White light is a mixture of all these lights. So is the visible light component of sunlight. The blue component of the visible light spectrum is known to wake us up and keep us on our toes by secreting a hormone called cortisol. Following the natural cycle of the sun, as the day wanes so should cortisol production. As the sun sets, in response to darkness a hormone called melatonin gets secreted. This hormone plays a key role in regulating our sleep. This beautiful dance between cortisol and melatonin maintains the day-night cycle and circadian rhythms.

Sleep-wake cycle from Dr. Eliza Klearman's website:

Now let us see how modern ways of living cause disruptions to this optimal cycle. Most of our houses are not built to let much sunlight in. Most people don't get exposed to sunlight in the early morning hours. Also because of being indoors at work or school, there is never enough exposure to sunlight during the day. But there is plenty of exposure to light in the evening hours when our bodies (evolutionarily) can't handle it. Now with the devices we suddenly have bright blue light in our lives in the evening when there used to be moonlight or darkness, just a few decades ago. This delays (may also inhibit) the onset of melatonin production and causes sleep disruption among many other problems. 

A little bit of anatomy: Human eye has two kinds of photoreceptor cells -- rods and cones. Rods are responsible for vision at low light levels and cones function when there is bright light. 

Human settlements now have well-lit homes, roads, public transport and indoor spaces. I was curious to know what happens to rod cells when there is no dim light at all for many years. I couldn't find any pat answer online. My guess is that the rod cells lose their efficacy since they haven't been used. I have seen the difference in night vision between city folks (used to a lot of artificial lights in the evening) and village folks. In the absence of a bright light in the night, the former can't navigate even in their own apartments; a dim light or darkness just doesn't work for them. Village folks on the other hand are undeterred by darkness outdoors and are confident about their unaided night vision.

All this understanding helped us realize that many conscious choices had to be made to realign ourselves to our evolutionary needs. We now live on a farm where we are outdoor a lot during the morning hours, soaking in a lot of sunlight. In the evening hours we have only warm-yellow LED lights (max 3w) lighting our indoors. The blue component of these lights are insignificant. Dev has a pair of blue light blocking glasses which he uses when needed. We have installed a blue light filter software on our computer. In the night, while sleeping, we have no artificial light indoor or outdoor. 

If you are interested in exploring this subject further, here are some pointers:

Dr. Satchin Panda on the importance of darkness

https://www.darksky.org/

Harvard University's research on blue light and sleep

In Appreciation Of Coconut Fronds

Coconut fronds are easily available in our area. They have many traditional uses -- broomsticks, roof-base for thatch, fuel in wood-burning stoves. We chanced upon this indigenous material while looking for options for unconventional uses at the farm. This post this about those applications.

To keep the house cool, we wanted to block the heat coming in though the windows that were facing east and west. We thought that the window blinds used on the insides won't be as effective as attempting to block the heat on the outside. Commercial outdoor window shades were expensive and were likely to get worn off after a few rains. We finally decided to use coconut fronds for this purpose. We had a pile of woven coconut fronds (keethu) from a previous project. We just tied a few of them in the following fashion and hung this panel off the roof. This thin layer surprisingly blocked off radiation and kept the rooms cool. Yes, it is a chore to hang up the panels in the mornings and take them off in the evenings. But the gains are quite satisfactory.

We have a circular chicken-mesh enclosure that contains the composting material. Our summer heat was drying up the compost pile and preventing it from decomposing well. We tried wrapping an old cotton fabric; it was working only till we had a gust of heavy wind during which this acted as a sail blowing the entire enclosure away. We had to come up with something else. We then planted coconut fronds all around the pile and tied them to the mesh structure. This is working just fine keeping the moisture content inside the pile intact.

In a span of just a few weeks we get a lot of brown leaves in the village. Many trees shed their leaves around the same time. We wanted to harvest this brown matter that could be used later as mulch or composting material. We wanted an inexpensive place to stock up all this bio-mass. Our farm worker Dhanraj built one for us using coconut fronds. He first made panels with the fronds, then tied the panels to the four posts of the enclosure below. One of four sides of this enclosure is operable.

Panel

Mulch enclosure built with frond panels

I noticed that little tree saplings were struggling to survive in the summer heat (42 deg C). The heat here peaks between 2 and 3 p.m. Blocking the afternoon heat became crucial. I planted coconut fronds in a line to do just the job. Three months into this, I know that these little plants have got over the hump. This flimsy, protective heat barrier is giving way, but it has done its job and at no cost! The mulch in the picture below is coconut frond leaflets discarded after broomsticks are made.

I plan to use light-weight frond tips on trellises to create partial-shade condition below for shade loving plants. The beauty of these fronds is that they are entirely local, mostly discarded and zero-cost. If they cease to offer the protection that we are looking for, they simply become part of the soil; there is no waste.

-- Hema

Turtle Walk

After getting to Chennai last week, we geared up very excitedly to walk the Neelankarai beach. We were going to participate in a turtle walk organized by a student group called the Students' Sea  Turtle Conservation Network (SSTCN). It is a voluntary group working on the beaches of Chennai since 1987, trying to conserve and create awareness about the endangered Olive Ridley sea turtle.

We had a cup of tea at 10:30 p.m. hoping earnestly that it will help us stay awake all night. When we reached the beach we were happy to find a lot of young people there for the walk. Since there were about fifty of us, the volunteers split us in to two smaller groups and started their introductory talk. One of the things they said that I found astonishing was that turtles have been around for 120 million years! They have been around since when dinosaurs were here on the planet! These creatures must be masters at adapting to the changes in their environment. And yet for the last three decades, this student network  has been trying to conserve the sea turtles. How did these incredible survivors, in the long history of evolution, get to the brink of extinction?

Over the course of the introductory talk, we learned about the unfortunate situation of these sea turtles. The female turtles lay their eggs in sub-surface nests on oceanic beaches. When these eggs hatch, the hatchlings move in the direction of the brightest light in their quest to find the sea. Until  modern times this was light of celestial bodies reflected off the sea. Now, without conservation efforts, the hatchlings would walk away from the sea towards bright human settlements, only to perish soon after beginning their lives. Our well lit "safe" beaches are quite unsafe for these ancient beings. 

When I looked up the internet on this subject, I found these images released by NASA that indicate a significant increase in India's night lights. The latest image below is of 2016's:

India''s Night Lights - 2016

Now compare this to that of 2012.

India's Night Lights - 2012

If you are curious about the global picture, here it is.

Light pollution or losing the dark is a serious, pressing problem and probably the least talked about of pollution issues. This is a relatively new phenomenon, just decades old in India. Animals (including humans), birds, insects, indeed most of life hasn't evolved to deal with light after sunset. And for some, like the turtles, it is a matter of life or death, of survival or extinction. Here is some good information about light pollution.

Back to the Turtle Walk.

We started the walk after midnight. A group of people from the forest department (!) had set out an hour earlier to scout for a fresh nest. Not all walks come upon a nest, but we hoped ours will. In the meanwhile we found a big Olive Ridley female. Washed ashore dead, thanks to trawling. I touched her shell, wondering how a creature encased in such impregnable armour was still so vulnerable to human activity.  This morbid find had affected the group's spirits and it weighed on us for the next half hour. 

This changed when we saw a signal from the forest scouts. We rushed to the spot where the scouts had located a potential nest. This called for some hand digging, which a volunteer started carefully. He said that these sub-surface nests have a short narrow neck and a round cavity underneath. Once he got to the cavity, he gingerly scooped out a white object, the size of a ping-pong ball and passed it to the group. It was warm to touch, the shell still not hardened. Likely laid less than a hour ago! The volunteer kept reaching in and bringing out more eggs while we were counting and bagging these precious little parcels. After a ten minute operation, we had 124 eggs in our bag! One hundred and twenty four! How did that mother manage to walk up the beach with so many eggs, dig out a beautiful nest, lay them all and then finally clean up the site to not leave a trace?  Truly magical.

We took a break around three in the morning. It was absolutely wonderful to lay down on the beach and doze off while listening to the waves. We woke up refreshed and ready for the last leg of the adventure. When we continued our walk, the conversation got around to eco-systems, their fragility and the fast rate at which they are disappearing due to Climate Change. Many of us walked in silence while digesting these hard realities. After an hour-long walk, the eggs were taken to a hatchery. There are many hatcheries on this beach between Neelankarai and Adyar. These are simple enclosures built with bamboo posts and woven coconut fronds. The eggs will hatch here in about two months and the hatchlings will be released into the sea.


-- Hema

Prosopis Julifolora

Prosopis juliflora, aka “veli kathan” or “seemai karuvel” in Tamil, is a thorny plant that was propagated by the Government of India in 1960’s for its use as firewood. This plant is aggressive, fast-growing, shade and fodder-giving. There was a recent ban on this plant by the Madras High Court. When this was in the news, I was wondering how we, as a species, could ban another species. Moral implications aside, there are practical issues behind banning something that can propagate by wind and survive in difficult conditions. Thanks to many environmentalists who appealed on behalf of this plant, the ban is now lifted. Here are our observations of this plant.

The picture above is one of the many circles that have formed “naturally” on our farm. These circles have a lot of neem, muddy (Morinda pubescens), Ziziphus mauritiana, Albizzia lebbeck, Leucena leucacephala, date palm, vines and ground cover. 

 I will walk you through the chronology of events behind these five year old poly-culture areas.

• until 2013, huge Prosopis trees were growing here. Shepherds used to bring in their cattle for grazing every day and have their cattle rest in the shade of these trees.
• we bought our land in 2013, and fenced it off primarily to stop grazing. 
• we did no maintenance of these areas – Prosopis was thriving. We used to see birds nesting there. 
• I had heard stories that Prosopis wouldn’t let any other plant survive under its shade. But what I saw, in the following years, was quite the opposite. There were many neem and muddy under the big Prosopis. These native plants were slender, trying to grow in between the branches of Prosopis. 
• In 2016, I decided to get the thorny trees cleared one by one, to make way for the more useful trees that were growing under them. Each Prosopis was cut down manually with great care, one person working two or three man days. The dug up soil was crumbly and rich in humus. Every Prosopis that we brought down had been instrumental in creating a big stand of trees.

I don’t believe that these Prosopis-created-poly-cultures on our farm are accidents or anomalies. My theory is that thorny Prosopis houses birds by providing a safe place for their nests.  Birds bring in seeds. Also, this plant’s widespread branches can trap seeds that are dispersed by the wind. Because of the moderate temperature in its shade, young seedlings stand a better chance there as opposed to germinating in a barren area exposed to the blazing heat. If there are no cattle to chew off the new under growth, soon we should see hardy, native varieties grow there. 

To think that we could ban a plant and be successful at it is quite naive. When the ban was in place, the local JCBs were working round the clock – burning precious fossil fuel and helping the rich JCB owners get richer. A year after the work, I see well-coppiced Prosopis growing more vigorously than ever before. 

Sure enough, Prosopis is not the best plant to have around. But it is certainly better than having a barren piece of land – because it provides shade, fodder and habitat. There is a pressing need to understand the tragedy of the commons (grazing areas), work with shepherds and aggressively plant native trees at the right time of the year. All these measures combined can help us reclaim our land. Until then Prosopis will rule.

-- Hema