On tar sands, oil shale, the like, and global warming:

“If we use unconventional fossil fuels then there’s no hope.”

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On the Bush-McCain plan for offshore oil drilling:

“It’s just a crazy thing to do.”

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— Dr. James Hansen, speaking at a National Press Club luncheon, which honored him and commemorated the 20th anniversary of the landmark 1988 Senate hearing on global warming.