Since both are myths, dreamed up by man's arogance and intentional ignorance of facts, nothing to worry about. Fact: parts of the earth are in a cooling trend right now. Fact: the earth has gone through other warming trends in the distant past and has not self-destructed. Fact: For the first time in decades, human life expectancy dropped, if this continues, "overpopulation" if it in fact exists, which it does not, would cease. Fact: there is more than enough energy, food, resources, etc for the population. The reason there are shortages in most places is because of governments with too much power that are corrupt preventing these resources from going where needed and also extremist environmentalists who cause more harm than good. Case in point: Malaria kills millions around the world. Its spread by a mosquito. DDT USED PROPERLY greatly deters the spread with minimal effect on the environment and animal life. Environmentalists say we can't use DDT, therefore millions continue to die many of them being children. Take the environmentalists where the children are dying and force them to watch a child die a slow painful death in agony. I thought the environmentalists purpose was to preserve all life, and yet they cause a myriad of pain, suffering , and death. They actually cause what they claim to work to prevent. UGLY!!!