The high court says that carbon dioxide is a pollutant and that EPA has authority to regulate tailpipe emissions.
A federal judge in West Virginia has ruled that the practice of dumping the rubble into streams from blown up mountaintops violates the Clean Water Act.
To justify an increase in logging on steep slopes in the Northwest, the Forest Service ignored advice from leading scientists including some from the Fish and Wildlife Service.
An attempt by the Bush administration to remove wildlife protection and exclude the public from forest-management decisions is rejected.
An attempt by irrigators to overturn minimum flows for salmon is rejected.
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Founded as the Sierra Club Legal Defense Fund in 1971