Two of the most ambitious land-restoration projects in the world share almost nothing except their stated goal. The Great Green Wall of Africa, launched in 2007, set out to plant a continent-spanning band of trees across 11 countries and re-green nearly 250 million acres. The Paani Foundation’s Water Cup, launched in 2016 in the Indian state of Maharashtra, asked villages to dig their own way out of drought during the 45 days before the monsoon.
Eighteen years and tens of billions of dollars later, the Great Green Wall has restored a few percent of its target. Nine years in, the Paani model has spread from a competition in three districts to a program expanding across all of Maharashtra.
The difference matters because it forces a question every climate funder will eventually have to answer: are the people who live on the land your project, or your beneficiaries?
Two visions, two ledgers
When the African Union launched the Great Green Wall, the imagery was striking. A 4,350-mile, 10-mile-wide band of trees stretching from Senegal to Djibouti. A “new world wonder” that would sequester 250 million tons of carbon, create 10 million green jobs, and pull the Sahel back from desertification. The UN priced the vision at $33 billion. National agencies were stood up in each of the 11 countries, with the World Bank, the EU, the Green Climate Fund, and others queuing up to fund it.
NPR reporters Julie Bourdin, Tommy Trenchard, and Maya Misikir visited 15 project sites across Senegal, Chad, and Djibouti in 2025 and found most had reverted to dust. They opened their April 2026 investigation with Abdi Guelleh, a father of 20 in southern Djibouti whose 2.5-acre farm was once meant to be one tiny brick in the Wall. The Global Environment Facility had funded a $150,000 borehole, a $100,000 solar pump, and a $50,000 dam. For a few years the farm grew tomatoes, legumes, and fruit. Then the dam sprung leaks. The pump broke. No one came to fix it. The land returned to desert. “What’s the point of having food for one day,” Guelleh told the reporters, “if I’ll have no food tomorrow?”
The Paani Foundation, co-founded by Indian actor Aamir Khan and filmmaker Kiran Rao after Maharashtra’s catastrophic 2015 drought, took a different route. Rather than build infrastructure for villages, it built a competition between them. The Satyamev Jayate Water Cup recruited villages from drought-stricken districts, gave them four days of residential training in watershed science, and then turned them loose for 45 days of competitive earthworks before the rains arrived. The work was done through shramdaan, or voluntary labor, by villagers themselves: check dams, percolation tanks, contour trenches, desilted ponds. By 2019, more than 4,700 villages across 76 talukas had joined. The Foundation’s figures put total water storage capacity created at roughly 550 billion liters per year.
The numbers on either side deserve scrutiny, and we’ll come back to that. But the structural difference is visible without them.
What the Wall keeps getting wrong
The original Great Green Wall vision was bad ecology from the start. “Scientifically, it was a disastrous idea,” agronomist Dennis Garrity, who led the World Agroforestry Center for 23 years, told NPR. By 2007, studies had already shown that large-scale tree planting in low-rainfall regions ended in “absolutely disastrous failure, over and over again.” The trees were the wrong species, there wasn’t enough water, and the people living near them had no reason to keep them alive.
Within a few years the project quietly broadened. Tree-planting stayed in the brochure, but funders shifted toward “land restoration” more generally. By 2020 a UN report found that only 4% of the target land had been restored. A study published in Land Use Policy in October 2025 surveyed 36 Great Green Wall plots in Senegal covering nearly 45,000 acres and found that only one was greener than it would have been from rainfall alone. The ecological benefits, the authors wrote, were “minimal to nonexistent.” Co-author Annah Zhu put it more bluntly: “They’re just throwing away money, planting trees in the desert for them to die.”
The money itself has become hard to follow. The Green Climate Fund alone has poured $14.4 billion into the initiative over the past decade. The EU contributed more than $1.78 billion between 2021 and 2023. In 2023, 80% of a $19 billion pledge had been “programmed,” but only 13% had been disbursed. Djibouti’s national agency told NPR it had received only $30 million across ten years, “less than 10% of what we were expecting.” Aminata Diallo, acting head of Senegal’s Great Green Wall Agency, was disarmingly candid: “There’s a myriad of actors involved without us being aware of what is being done.”
A 2021 Science survey of agroforestry projects across 66 nations identified the most common failure mode bluntly: lack of community input. Trees die of neglect when planners haven’t asked residents which species to plant, or whether they’re willing to provide the water and protection saplings need. Farmers, as a separate Ethiopian study put it, “will not manage trees that they do not value.” That’s the through-line in every Great Green Wall failure NPR documented. When the pump breaks, the villagers have no standing, sometimes literally no spare parts, to fix it.
Why Paani’s model survives bad years
The Paani Foundation’s competition gets the incentive structure backwards from the Wall’s, in a useful way. The village isn’t the recipient of the project; the village is the project. Villagers are trained in watershed mapping and soil moisture management. They build the structures themselves, on their own land, with their own labor. The competition adds social pressure: the neighboring village’s contour trenches become a benchmark.
This design solves the maintenance problem before it appears. A check dam built by outsiders is someone else’s problem when it cracks. A check dam dug with your own hands, on land your family farms, with your neighbors watching, is yours. A 2023 paper in the South Asian Journal of Management analyzed the Water Cup as a case study in “gamified” development: framing watershed management as a competition with a deadline turned a tedious public-works exercise into a source of collective pride.
The model has limits, and the Paani Foundation has been increasingly open about them. After the first wave of construction in 2016 to 2019, the foundation pivoted in 2022 to the Satyamev Jayate Farmer Cup, because creating water without changing how it’s used had begun to backfire. As villages refilled their aquifers, some farmers expanded into water-intensive sugarcane, eroding the gains. Independent assessments note that more than 90% of Water Cup villages lacked robust follow-up systems, and that earlier Maharashtra watershed projects have shown the same pattern: an initial rise in the water table followed by depletion as use outruns recharge.
Paani’s headline figure of 550 billion liters of “water storage capacity” measures the size of the bucket, not the reliable annual yield. Many of the Foundation’s success metrics come from the Foundation itself. Rigorous third-party evaluation hasn’t been done at the same scale. So one defensible read is: we don’t yet know how durable Paani’s gains are.
But even granting all that, the structural difference holds. When a Paani village’s check dam silts up, the village can re-mobilize labor to clear it. When a Great Green Wall pump breaks, the village waits for a grant cycle that may never come.
The model that’s actually working in the Sahel
Here’s the part of the Great Green Wall story that doesn’t get told often enough: a community-led model is working in the Sahel. It’s just not the Wall.
In 1983, Australian agronomist Tony Rinaudo, working in Niger, noticed that what looked like scrub vegetation was actually the resprouting tops of an extensive “underground forest” of root systems from trees cleared decades earlier. Rather than plant new saplings, which were dying at devastating rates, he taught farmers to identify and selectively prune these stumps, letting nature do the regrowth. The technique became known as Farmer Managed Natural Regeneration, or FMNR.
The results are extraordinary. Over roughly 20 years, FMNR spread to more than five million hectares in Niger alone, raising tree density from about four trees per hectare to over 40, and restoring an estimated 200 million trees. A 2013 World Vision Ghana study calculated a 6:1 social return by year three of a typical FMNR project, projected to reach 43:1 ten years after project closure. Per-hectare costs are roughly $14 in farmer labor in Niger. Globally, FMNR practices now span more than 18 million hectares across 27 countries.
FMNR works for exactly the reasons the Wall doesn’t. It puts farmers first as decision-makers. It demands almost no external capital. It produces direct, near-term benefits like firewood, fodder, and crop yield gains that motivate continued adoption. And it spreads laterally, farmer to farmer.
This is, structurally, the same model Paani uses. Train people. Hand them the tools. Get out of the way.
There are pockets of the official Great Green Wall that look more like this. NPR’s reporters found one in Barkadroussou, in Chad’s Kanem province, where the regional NGO SOS Sahel taught villagers to stabilize dunes, installed a solar pump, and provided seeds and training. The oasis now supports over 300 farmers. Young men who had left have come back. But the project’s funding ran out in 2023, and as NPR put it, the whole thing “remains just one broken pump away from failure.”
That’s the Great Green Wall in miniature. The moments when something works are nearly always the moments when someone has reverted to a community-led model, and the work is precarious because the financing structure was never designed to keep it going.
What the contrast actually teaches
It would be too neat to say Paani has cracked the problem and the Great Green Wall has failed. Paani has unanswered questions about long-term durability. The Great Green Wall has, despite everything, supported real gains in pockets like Niger’s FMNR landscapes and Chad’s oases.
But the contrast points to something the climate-finance world is going to have to internalize. Big top-down restoration projects in fragile regions don’t fail because the agronomy is too hard. They fail because the people doing the work don’t own the work. Recipient-shaped projects require permanent external funding to stay alive, and that funding tends to arrive in lumps that get “programmed” rather than disbursed, gets routed through ministries that don’t talk to implementing agencies, and runs out before the equipment fails.
Participant-shaped projects survive bad years because the maintainers are the beneficiaries. They survive leadership turnover because the project doesn’t depend on any single leader. They survive funding gaps because their main input is labor, not procurement.
The hard part is that Paani’s model is hard to copy. Maharashtra has a tradition of shramdaan, the convening power of a globally recognized actor, and reasonably functional rural institutions. The Sahel has been called Africa’s “Coup Belt” for a reason. You cannot simply airlift a competition format into Mali and expect villages to compete during a counterinsurgency.
The lesson isn’t “do what Maharashtra did.” It’s that any greening project in a fragile region has to find some local equivalent of shramdaan, some reason the people doing the work want it to last, before the donor money shows up. The Great Green Wall’s tragedy is that it spent eighteen years and tens of billions trying to do this in the opposite order.
The Paani Foundation’s real contribution to global land-restoration thinking isn’t its hydrology or even its competition format. It’s the demonstration that a project can scale by handing power away rather than concentrating it. That is, in the end, the thing the Great Green Wall most needs and most lacks.
Sources
Primary articles
- Bourdin, Julie; Trenchard, Tommy; and Misikir, Maya. “The Great Green Wall’s one of the world’s most ambitious eco-projects. Is it working?” NPR, April 11, 2026. click here for full article
- Tigens, Esri. “Desert Greening, India Style: The Paani Cup.” The Lotus Post, August 25, 2025. click here for full article
Peer-reviewed studies and academic analysis
- Land Use Policy (October 2025) study on Great Green Wall plots in Senegal.
- Mody, Pallavi; Srivastava, Sushmita; and K.C., Shyam. “Paani Foundation: A Gamified Approach to Water Crisis in Rural India.” South Asian Journal of Management, 2023.
- Höhl, Markus, et al. Survey of agroforestry projects in 66 nations, Forests, 2020.
- Studies on Farmer Managed Natural Regeneration in Scientific Reports (2020), Environmental Management (2015), and Agroforestry Systems (2019).
Reports and institutional sources
- UN report on Great Green Wall progress (2020).
- World Vision Ghana, Social Return on Investment study on FMNR (2013).
- World Bank Independent Evaluation Group, “Scaling the Great Green Wall?” (2021).
- Transparency International, “Community-led climate solutions: Insights from the Great Green Wall” (2024).
- Science magazine, “New funds could help grow Africa’s Great Green Wall” (2021).
Foundation and NGO sources
- Paani Foundation, via India Water Portal.
- Global Earth Repair Foundation (June 2025).
- Evergreening Global Alliance, FMNR documentation.
- CIFOR-ICRAF (Forests News), February 2026.
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