Why has some tropical grassland in Africa become desert, like the Sahel?

The Sahel contains the fertile delta of the Niger, one of Africas longest rivers. Unfortunately, the Sahels fertile land is rapidly becoming desert as a result of drought, deforestation, and intensive agriculture. This process is known as desertification.

Explanation:

bc of loss of water plus African Humid Periods Paced by Earth's Orbital Changes.

Explanation:

i hope this helps ;) - Mal

question

which are human systems?

the amazon rain forest

the appalachian trail

the george washington bridge

the himalayas

the hoover dam

the north american free trade agreement

answerthey are called the pampas;