Documents Desertification Desertification in the Sahel source: NASA Earth Observatory.

Desertification Desertification Desertification in the Sahel source: NASA Earth Observatory What is a desert? Deserts cover about one fifth of the Earth's surface and…

Documents Desertification

Desertification Desertification Desertification in the Sahel source: NASA Earth Observatory What is a desert? Deserts cover about one fifth of the Earth's surface and…