Concrete is one of the most destructive materials in the world. Now researchers in Germany and Nigeria are working together to make a version out of cassava peels. It's cheap, strong and eco-friendly.
On this week's Eco Africa, we see how to make concrete from cassava peels in Nigeria and learn about the Namibian government's integrated management approach for conservation, poverty reduction and job creation.
Global warming has changed city life in Phoenix: When it gets too hot, construction crews start work at 4 a.m. and the zoo opens at dawn. But for some people, the heat is more than an inconvenience. It can turn deadly.
Sand as a building material is essential especially for highly industrialized societies. It's widely used around the world, and there seems to be no shortage. However, demand can easily surpass supply in some regions.
By 2050, Berlin could be as warm as Canberra in Australia. With cities around the world grappling over solutions to rising temperatures, Germany's sunniest city is wasting no time to act.
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