Catastrophic Climate Future: Are We That Stupid?Andrea Thompson Senior Writer LiveScience.com Wed Apr 29, 1:11 pm ET Most of us have heard the predictions: the meltdown of Arctic sea ice and mountain-top glaciers; extinction of species ranging from polar bears to coral reefs; catastrophic sea level rise that could eventually force the relocation of millions of coastal residents. Heat waves, malnutrition and famine, and wildfires would also be a greater risk to human communities if carbon dioxide levels in Earth's atmosphere are allowed to rise too high. Specifically, these could be the characteristics of a world where carbon dioxide has...