USA Today: Hundreds of climate scientists are gearing up to fight back against climate change skeptics and political efforts to kill regulations aimed at reining in man-made greenhouse gas emissions, The Los Angeles Times reports. The newspaper says the 91-year-old American Geophysical Union, an international non-profit scientific association with more than 50,000 members, will announce today that 700 climate scientists have agreed to speak out as experts on questions about global warming and the role of…