20 years ago local village chiefs in Ghana founded a conservation programme to protect pygmy hippos. The programme is a success and the number of hippos has increased from two to almost 40.

In Cairo, green spaces are a rare luxury. That's what inspired urban farming startup Schaduf to help poor Egyptians clean up roofs and create gardens, thereby greening the city and improving their quality of life.

Botswana's Chobe National Park offers a complete package for eco-tourists, including a renewable-powered hotel that recycles water and waste, and safari trips in silent, emission-free e-cars.

The average toilet uses around six liters of water for every flush. Two sisters from Frankfurt have based their business around an eco-friendly alternative: portable compost toilets.

Inspired by her grandmother's traditional soap-making methods, a young entrepreneur has found success in Cameroon selling natural soap products to shops and beauty salons.

An organization in Nigeria is combining environmental action with female empowerment. It trains women to recycle waste plastic by weaving it into fashion accessories - which they can sell for a profit.

A small team in Ghana is using old laptop batteries to create a backup power system they call the PowerTube. It is a unique way to deal with the tons of e-waste imported into Africa each year.

As the population swells in Zimbabwe's capital, some people are building homes on the city's wetlands. But residents and environmental groups have come together to restore and protect these unique ecosystems.

South Africa is one of the most densely fenced countries on earth. Intensive farming has taken a toll on the land, but an initiative to remove fences and encourage animals' natural migration is helping it to recover.

Electronic waste can be costly and even dangerous to dispose of. In Cameroon's capital Yaoundé, the NGO Solidarité Technologique collects and recycles electronics — making them more affordable for locals.