 As the areas around 30 degrees latitude become drier, those inhabiting that region will see less rainfall than traditionally expected, which could cause difficulty with food supplies and livability.There is strong evidence of paleoclimate climate change in central Africa's rain forest in c. 850 B.C.Palynological (fossil pollen) evidence shows a drastic change in rain forest biome to that of open savannah as a consequence of wide-scale drying not connected necessarily to intermittent drought but perhaps to gradual warming.