The health status of “millions of people” will be affected by climate change in the years ahead, concludes the latest authoritative report from a United Nations international panel of scientists and policy makers. The study, which was based on five years of detailed scientific research around the world, paints a graphic picture of the environmental consequences of a continuing increase in the earth's temperature. These range from major water shortages and migration from coastal regions as sea levels rise to hunger and the potential disappearance of up to 30% of plant and animal species....