climate - annual rainfall is variable between 200-500mm pa , the wet season has intense tropical downpours with high erosivity , little rain = less crops = no roots to hold soil = blown or washed away , temps are over 30 degrees throughout year
drought - water disapears = crops disapear
wind- gales in exposed desert blows top soil away and dust storms for up to a month
insects - swarms of locusts strip the land bare , without routs soil turns to desert
