THE HOT--SNOWBALL EFFECT¬More people in our overpopulated world use more fossil fuels and produce more greenhouse gases¬These gases warm the air and increase water vapor¬This heats the air even more since water vapor is a greenhouse gas*Less arable land*More famines*More forest fires*More violent storms as upper air cools--releasing the water vapor as rain and snow*Oceans warm and become more acidic--reducing shellfish*Permafrost thaws releasing more methane*Ground-level heat and air pollution sicken and kill millions¬Air and ocean warm more--glaciers and Arctic and Antarctic ice sheets melt*Sea levels rise-- less living area and less farmland for a growing population*Under-sea reservoirs of CO2 and methane are released*River transportation of goods severely reduced due to reduction of glacier volume*Less fresh water due to glacier melting (higher costs for desalinization)*Water wars--migration wars¬Severely reduced population survives in the far north and far south of the hemispheresBUT WHY WORRY? SOME HOMO SAPIENS MAY SURVIVE!