HARARE, Zimbabwe (AP) — From ancient fertilizer methods in Zimbabwe to new greenhouse technology in Somalia, farmers across the heavily agriculture-reliant African continent are looking to the past and future to respond to climate change.

Africa, with the world’s youngest population, faces the worst effects of a warming planet while contributing the least to the problem. Farmers are scrambling to make sure the booming population is fed.

With over 60% of the world’s uncultivated land, Africa should be able to feed itself, some experts say. And yet three in four people across the continent cannot afford a healthy diet, according to a report last year by the African Union and United Nations agencies. Reasons include conflict and lack of investment.

In Zimbabwe, where the El Nino phenomenon has worsened a drought, small-scale farmer James Tshuma has lost hope of harvesting anything from his fields. It’s a familiar story in much of the country, where the government has declared a $2 billion state of emergency and millions of people face hunger.