Planet TIGER. The United Nations' climate chief is expressing optimism about the movement among various countries to discuss a global carbon-emissions treaty, less than two months after the Copenhagen conference failed

Planet TIGER President Barack Obama wants the United States to move more quickly to increase its reliance on alternative fuels. A presidential panel advocates greater use of biofuels and clean coal

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Planet Tiger. Victoria Switzer and her husband, Jim, are building what they hoped would be their retirement home in the rural hamlet of Dimock, Pennsylvania, in the eastern U.S. When Cabot

Photo: Sabine Aronowsky Manhattan borough president Scott Stringer speaking at an anti-gas-drilling rally in New York Planet Tiger Environmentalists claim the drilling could contaminate New York's unfiltered drinking water sources with dangerous chemicals

Photo: World Food Program/Natasha Scripture Planet Tiger. In the run-up to the Copenhagen climate conference, many experts said agriculture should be a central issue in the discussions. After all, farmers are directly

Planet Tiger. World Health Organization Director-General Margaret Chan says she is disappointed a deal on climate change was not struck in Copenhagen.  But she says important steps were taken that, she

Planet Tiger Some Americans feel cost of climate change legislation is greater than benefit Climate change legislation, passed by the U.S. House of Representatives, appears stalled in the Senate.  Many conservatives in

Planet Tiger The international conference on climate change opens Monday in Copenhagen, Denmark, hosting thousands of participants and observers hoping to reach a deal to combat global warming. Initial expectations have

Planet Tiger Two-week conference aims to achieve legally binding agreement to cut greenhouse gas emissions and has been billed as last best chance to clinch a deal. UN officials, climate experts, environmental