The air in Nairobi is polluted by emissions from cars, buses and mopeds. The first solar-powered trucks and jeeps with electric motors have now started appearing. While the energy is cheap, the vehicles are not.

A social entrepreneur in Ghana is running a project that turns some of Accra's tons of plastic waste into quality footwear. His small team is not only clearing the environment of plastic, but the recycling creates jobs.

Across Nigeria, it's common to see waste dumped into streams, rivers and seas. For those who work in the water transport business, marine litter is a major problem. Now a group is trying to clear the path.

A group of rural farmers in western Uganda is helping protect the country's indigenous seeds through a community-based initiative that is empowering women to better nourish their families and improve household income.

Senkelle Swayne's Hartebeest Sanctuary in Ethiopia is home to a rare antelope known as Qorkey. To protect the animals the Oromo people came up with new guidelines on how to work together with local communities.

The global demand for housing is rising. But cement is a major source of carbon emissions. Scientists in Switzerland have developed a low-cost, cement-free concrete that has far less of an environmental impact.

The tiny island of Kokota is barely inhabited, yet its forest and ecosystem are in tatters after years of abuse. Now a group of volunteers is helping locals replant trees and revive its unique river system.

In the Ivory Coast, a young and upcoming artist is taking apart old mobile phones and turning the pieces into pieces of art. It is a creative way to reuse the many phones that are simply tossed away.

For years Modou Fall has been a tireless anti-plastic campaigner. He gladly swaps a paper bag for a plastic one to get it out of circulation. Now his work is paying off as the country bans some single-use plastic items.

As desertification and soil erosion have led to the loss of arable land in Nigeria, could hydroponic farming be a sustainable alternative?