The German city of Hanover is taking on the disposable coffee cup culture with a reusable cup scheme. Coffee drinkers can pick up a cup for a small fee, which they get back upon returning it.

One farmer in Uganda isn't too worried about lack of rainfall. That's because he's invented a clever drip irrigation system by recycling plastic bottles.

Garden City in the Kenyan capital Nairobi is one of the largest green building projects on the African continent. The site includes a car park that doubles as a giant solar panel. It also champions a pioneering waste disposal system.

Women are especially vulnerable to climate change. Yet because of their caretaker role at home, they also have a big impact on what the next generation does regarding the environment. An interview with Catherine Mungai.

In Burkina Faso, Mossi Princess Abze Djigma has founded a company that brings solar products and solutions to improve the lives of people in rural and urban areas who have no or poor access to electricity.

Electronic waste is a major problem in many African countries. Rwanda is trying to solve the problem with recycling. As part of a government initiative, the country is collecting e-waste in all 30 districts.

A group of women in western Uganda are making paper – and a livelihood – out of elephant dung. The women, mostly widows whose husbands were shot hunting elephants for their tusks, also hope to combat elephant poaching.

Fashion brand Ecoalf is trying to reduce the millions of tons of plastic waste reaching oceans annually by working with local fishermen to collect trash in the Mediterranean. They then "upcycle" the waste into new goods.

The lemurs of Madagascar are vital to the pollination of baobab trees but are endangered because slashing and burning practices are destroying their habitat. Scientists are trying to save them from extinction.

Nigeria's farmers are facing increasing challenges, including from climate change. Nnaemeka Ikegwuonu founded Smallholder Farmers Rural Radio to help and teach them sustainable farming techniques.