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Why are the roads red in Africa?
On the African continent, the roads are very often red. This red color offers a sharp contrast with the green color of the surrounding vegetation. The ground is made up of laterite, a very sharp tropical rock that is bright red or reddish-brown, known to be rich in iron. In tropical regions, where it is hot and humid, iron oxidizes easily and takes on the color of rust. Photo credit: Damian Patkowski
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