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If 97% of climate scientists are right, then history will judge present-day world leaders first and foremost on what they did to combat climate change once the plight was made clear. Take Barack Obama. 75 years from now, people may look back and ponder: We had the necessary information, we understood the risks, and yet a president elected on a platform that included a promise to fight global warming failed to preserve a livable climate for much...Read the full story on TreeHugger