Nature and EnvironmentEco-at-Africa - The Environment MagazineTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoNature and Environment08/23/2017August 23, 2017Green car washes, cotton wool strong enough to absorb oil spills, and self-charging bicycles: all of this and more on the latest eco@africa.https://p.dw.com/p/2iiPyAdvertisement