The Silent Carbon Sink: Why Urban Food Forests Could Save Sahelian Cities

In the scorched streets of Niamey, the air often feels like a solid wall of heat. Yet, beneath the canopy of a mango tree or a hardy acacia, the temperature drops and the dust settles. These shaded pockets are more than just a respite; they are the front lines of a quiet battle for survival in the Sahel.

As cities across Niger face intensifying climate pressures, the search for resilience has moved from remote fields into the heart of the city. Urban centres are often viewed as heat islands, yet they contain hidden assets that provide both sustenance and environmental protection.

The Hidden Value of Urban Food Forests

In a preliminary study awaiting peer review, researchers mapped the architecture of Niamey and Maradi’s edible greenery. Surveying over 4,400 trees, the team identified 59 different food-bearing species. The data suggests these spaces are diverse, with a Shannon diversity index exceeding 2.0 in both cities.

The research measured the carbon stored within these urban groves. Early-stage findings indicate that Niamey’s food forests hold roughly 2.85 tonnes of carbon per hectare, while Maradi’s reach 3.58 tonnes. These results suggest that planting for the stomach also helps the atmosphere.

Integrating these edible forests into national climate policies could help Niger secure international climate finance. By treating every fruit tree as a carbon credit, cities may finally secure the resources to expand the shade they desperately need. This approach suggests a future where urban food production and climate mitigation are one and the same.