Africa's top 5 greener transport ideas

1. Solar taxis

In Ivory Coast, around 80 percent of vehicles are used imports, with many of them spewing out clouds of smoke as they drive down the road. But a fleet of three-wheeled solar-powered taxis are now providing transportation that's much better for the environment.

2. Bamboo bikes

A Ugandan entrepreneur and cycling enthusiast has developed a more sustainable bike with a frame made from fast-growing and readily-available bamboo. Not only are they strong and durable, they are also light.

3. Boats out of plastic bottles

Social entrepreneur Ismael Essome Ebode hit upon a novel idea - making unique boats by tying plastic bottles together. This helps the environment by using bottles that would otherwise choke the country's drainage system.

4. Harnessing the sun for e-bikes

In Namibia, SunCycles makes e-bikes that are charged by solar power – it's an ideal solution in one of the sunniest countries in the world, with an average of 300 days of sunshine a year.

5. Smart traffic in Kenya

Kenya's capital, Nairobi, has a huge traffic and air pollution problem. But  Kenyan mobile, web and SMS platform Ma3Route wants to change that with a smart crowd-sourced solution.