This report issued by the Intergovernmental Panel on Climate Change (IPCC) talks about how bad climate change will become, if we don’t do something now. It talks about projected temperature increases of 4 to 5 C (1.8 * 4 = 7.2 to 9 degrees Farenheit), which will risk damaging food supplies and water, will cause the exterminateon of 20-30% of all wildlife, cause a permanent rise of sea levels so that many islands and coastal areas will flood or become completely submerged, and other rather unpleasant consequences of inaction. There is hope, however, that much of the damage can be prevented, if we act now to limit greenhouse gases.