Kibera, the largest slum in sub-Saharan Africa, is an assault on the senses. Home to between 700,000 and a million people, Kibera is crowded, noisy and polluted. Most families lack even the most basic amenities. It’s teeming, flooded with people on the move: working, selling goods, sorting rubbish and herding livestock.

Global fluctuations in food prices can decimate an economy as fragile and overlooked as this one, but creative farming methods are helping to guarantee that Kibera’s residents have access to food.