大象传媒

The Sahel is a band of semi-arid land to the south of the Sahara desert. The rainfall is variable and falls mainly during July and August. Rainfall levels in the Sahel used to be higher but now drought is occurring. In wetter times, the Sahel became more populated. Trees were cut down for fuel and cattle were introduced and the vegetation became overgrazed and depleted. Now lower levels of rainfall are being experienced and desertification is taking hold.