Uganda's crowded capital Kampala offers little space to grow crops. But some schools in the city are promoting a new initiative - which helps students stay healthy and save money.

Terra Preta is a highly fertile mixture based on an old indigenous formula from the Amazon region. Farmers in Germany are using it to improve soil which has been exhausted by years of monoculture.

A Zimbabwean startup is tackling plastic waste by recycling it into a product that also helps save energy. They've developed Temperature Bags, which allow food to keep cooking after being warmed briefly on the stove.

Animal droppings and pond water might not sound appetizing, but they can help produce tasty crops: These farmers in Nigeria are integrating agriculture with poultry and fish farming to cut waste and boost production.

Since 2013, Mohamed Awale has been producing accessories out of a unique mix of old jeans and Kenyan fabrics. Selling only online and at select markets in Nairobi, he has created colorful backpacks, bags and wallets.

Ray and shark species in the Adriatic Sea are threatened with extinction. Biologists have found high levels of heavy metals in the water and suspect that illegal dumping is behind the problem.

A startup in Hamburg has created a vertical farm — a warehouse of stacked beds grown under artificial light — and already delivers lettuce and herbs to ten local restaurants. But what are the real environmental costs?

Most people in rural Cameroon have just one option for cooking — firewood. But recently a group started installing biogas in rural communities. The organization now has ten employees and its own workshop.

Somaliland is one of the poorest regions in the world, but instead of waiting for international donors, Abdishakur Mohamoud has started a company to bring electricity to part of the country's huge rural population.

The Ol Kinyei Conservancy in Kenya lies in traditional Maasai land. The area is now home to an array of animals and is proving to be a valuable local asset since it brings in a constant flow of safari tourists.