The best models scientists have reveal very close correlations of carbon dioxide with temperature increases over the last several decades. The models project disastrous effects from increasing temperatures if carbon dioxide concentrations continue to increase. The 90 percent probability statements of the 2007 Intergovernmental Panel on Climate Change report are weighty scientific statements that should not be ignored. The question is whether we can afford to gamble with the future of Earth's life-support systems. Everything we do to develop alternate energy sources to combat possible global warming, we should be doing anyway because of other very serious negative effects of...