Grasslands — also known as savannas, prairies, steppes and pampas — are ecosystems found in parts of the world that do not get sufficient consistent rainfall to support forest growth, but get ...

But too many fires and extensive burning can degrade grasslands. About 500 million hectares of tropical and subtropical savannas, woodlands, and open forest are burned each year.

The human lineage originated about 2.5 million years ago, coinciding with the expansion of savannas — grasslands mixed with trees — across East Africa.

Savannas and grasslands cover a vast area, some 20 percent of the earth’s land surface — from sub-Saharan Africa, to the Cerrado in Brazil, to North America’s heartland.

Regular fires in the African grassland help the growth of new vegetation, are non-polluting and necessary for the survival of several animals. Colin Beale, The Conversation Aug 29, 2019 · 11:30 pm ...