Sam Knowlton Profile picture
Mar 28 11 tweets 3 min read Read on X
After $1B invested over 15 years, the Gates-backed Alliance for a Green Revolution in Africa (AGRA) promised agricultural prosperity.

Instead, AGRA delivered ecological damage, farmer debt, and increased hunger, leaving target countries worse off than before the program began🧵 Image
AGRA began in 2006 with bold targets to 2x yields and incomes for 30M smallholder farmers while cutting food insecurity in half by 2020.

Evaluations reveal what farmers already knew—AGRA did not meet its headline goal even after reducing its target from 30M to just 9M farmers.
The productivity reality falls far short—an 18% yield increase over 12 years against AGRA's promised 100%.

Many regions saw growth equal to or worse than pre-AGRA rates.

This structural failure hides behind selectively presented data and isolated success stories. Image
Hunger increased by 30-31% across AGRA's 13 focus countries.

The very metric AGRA was designed to improve has significantly worsened, exposing critical flaws in their entire approach to agricultural development. Image
AGRA's single-crop farming model caused biodiversity loss by pushing farmers toward maize at the expense of hardy local varieties.

Traditional climate-resilient crops declined measurably, with millet production dropping 24% between 2006-2018.
Research in Zambia and Tanzania shows farmers trapped in debt after taking loans for fertilizer and hybrid seeds when harvests didn't deliver promised yields.

This financial burden from input-dependency affects multiple generations of farming families.
Beyond economic impacts, AGRA's chemical-intensive approach has accelerated soil degradation across target regions.

Synthetic inputs disrupt soil microbial communities, compromising fertility and essential ecosystem functions like water storage and carbon sequestration.
The specific soil contaminants associated with AGRA's model include PCBs, PBDEs, perfluoro carboxylic acids, benzene, and bisphenol A, compounds with documented adverse effects on ecological and human health systems.
While AGRA now acknowledges soil degradation (65% of Sahel land affected), its solutions remain tied to chemical-intensive farming.

New programs like ESMS and RE-GAIN show recognition of problems without addressing their root causes.
African civil society organizations increasingly call for redirecting funding from AGRA toward agroecological systems that align with both ecological imperatives and the lived realities of farming communities rather than imposing external technological dependencies.
AGRA misdiagnosed the problems facing African agriculture

After 15 yrs and $1B, hunger increased by 30%, yields barely improved, soils degraded, and farmers accumulated debt.

Real solutions will restore ecological health while providing farmers with a pathway to prosperity

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More from @samdknowlton

Mar 25
A new study claims grass-fed beef is as carbon-intensive as industrial beef.

This conclusion relies on a narrow, linear analysis that misses the complex ecological reality of grazing systems.

Here's why this claim is wrong: Image
Well-managed grazing dramatically enhances biodiversity, builds healthy, resilient soils, supports water cycles, and contributes to carbon storage both below and above ground.

These critical ecological functions are largely overlooked in the study's limited analysis.
Grazing cattle create a complete nutrient cycle—improving soil biology, enhancing water infiltration, and distributing nutrients through manure.

This natural system replaces synthetic inputs (major emission sources) and delivers ecological benefits the study entirely overlooks
Read 11 tweets
Mar 21
Our taste buds and sense of smell evolved to decode the chemical language of plants.

The compounds that create flavor in whole foods are often the exact same molecules that benefit our health, a fundamental relationship that modern food processing has profoundly disrupted. 🧵 Image
The human nose can distinguish trillions of different smells with just 400 types of scent receptors working in combination.

This system evolved specifically to help us evaluate which plants were nutritious and which might be toxic.
Take the compound lycopene in tomatoes: it contributes to their rich umami flavor while simultaneously protecting cells from oxidative damage and supporting cardiovascular health.

This dual purpose of plant compounds is consistent across many foods.
Read 11 tweets
Mar 17
History often frames the Irish Potato Famine as a simple crop failure story. A closer look tells a different tale:

Ireland maintained net food exports while 1 million starved—showing how institutional architecture, not technological limitation, created catastrophe... 🧵 Image
Ireland wasn't technologically backward during the famine years.

It existed right alongside England during the British Agricultural Revolution, a time when crop rotation boosted farm yields by 50% and selective breeding dramatically improved livestock productivity.
At the time approximately 10,000 landowners controlled 95% of arable land, predominantly as absentee owners, establishing extractive dynamics where agricultural surplus flowed outward rather than reinvested locally.
Read 13 tweets
Mar 12
Microplastic pollution is disrupting photosynthesis across ecosystems and cropland, threatening our food security in ways we've drastically underestimated.

These invisible particles degrade our soils and undermine the biological foundation of our food system...🧵 Image
Microplastics physically block sunlight on leaf surfaces, disrupt internal nutrient transport pathways, release adsorbed toxins into plant tissues, and induce oxidative stress—collectively degrading photosynthetic efficiency at cellular levels. Image
Microplastic particles in soil and water reduce plants' ability to convert sunlight to energy by 7-12% and decrease the green pigment plants need for this process by 11-13%.

This damage affects everything from crop fields to marine algae.
Read 7 tweets
Mar 11
Pesticides persist in soils for decades, not months.

A study of 100 fields shows even after 20 years of organic management, soils contain up to 16 different pesticide compounds—disrupting microbial communities and undermining productivity long after application stops... 🧵 Image
Fields were analyzed across the agricultural spectrum—from conventional operations to established organic farms.

Certified organic soils contained significant levels of atrazine, chloridazon, and carbendazim (a compound linked to declining reproductive health). Image
The data contradicts what's on pesticide labels. Atrazine's official half-life (6-108 days) suggests quick breakdown, but field measurements show it persists for decades.

Our current models dramatically underestimate how long these compounds actually remain in soil systems.
Read 12 tweets
Mar 10
Biological Transmutation challenges a fundamental axiom of science: the immutability of elements.

Evidence suggests living systems can change one element to an entirely different one at ordinary temperatures—forcing us to reimagine the basic rules of matter itself... 🧵 Image
First documented systematically by Louis Kervran, biological transmutation suggests organisms possess biochemical pathways capable of rearranging nucleons at low energy thresholds, effectively converting one element to another through non-nuclear processes.
Studies reveal organisms generating elements absent from their environment.

Hens producing calcium-rich eggshells despite calcium-deficient diets, seeds in distilled water developing unexpected minerals.

This phenomenon spans plants, animals, and microbes alike.
Read 12 tweets

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