Sierra Club Executive Director Carl Pope gestures during the Reuters Global Climate and Alternative Energy Summit in San Francisco, California September 8, 2009. Reuters Pictures 2 months ago

Sierra Club Executive Director Carl Pope gestures during the Reuters Global Climate and Alternative Energy Summit in San Francisco, California September 8, 2009.

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  1. Sierra Club Executive Director Carl Pope speaks during the Reuters Global Climate and Alternative Energy Summit in San Francisco, California September 8, 2009. The U.S. Environmental Protection Agency would step in and regulate carbon dioxide emissions by creating a cap-and-trade system or take other measures if Congress fails, but is likely to wait for 2010 elections, the head of the Sierra Club said on Tuesday.

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  1. Sierra Club Executive Director Carl Pope speaks during the Reuters Global Climate and Alternative Energy Summit in San Francisco, California September 8, 2009. The U.S. Environmental Protection Agency would step in and regulate carbon dioxide emissions by creating a cap-and-trade system or take other measures if Congress fails, but is likely to wait for 2010 elections, the head of the Sierra Club said on Tuesday.
  2. Sierra Club Executive Director Carl Pope gestures during the Reuters Global Climate and Alternative Energy Summit in San Francisco, California September 8, 2009.
  3. Sky Robinson a Sophmore at the University of Missiouri speaks out against coal burning power plants as other students protest behind her Wednesday September 16, 2009, in Columbia, Missouri. The protest was part of a national Sierra Club campaign to reduce reliance on coal for energy starting with campus power plants such as the one at MU.

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