Human health would also be affected

Human health would also be affected.Warming could enlarge the tropical climate bringing with it yellow fever,malaria,and other diseases.Heat stress and heat mortality could rise.The harmful effects of localized urban air pollution would very likely be more serious in warmer conditions.There will be some benefits from warming.New sea-lanes will open in the Arctic,longer growing seasons further north will create new agricultural lands,and warmer temperature will make some of today's colder regions more habitable.But these benefits will be in individual areas.The natural systems-both plant and animal-will be less able than man to cope and adapt.Any change of temperature,rainfall,and sea level of the magnitude now anticipated will be destructive to natural systems and living things and hence to man as well.