A Senate bill's target for emission cuts is akin to level US is likely to offer in Copenhagen. Ahead of the global warming talks, other nations have been waiting to see US target.
Do you need an environmental expert to guide you in a green home renovation?
Controlled fires triggered the appearance of the hybrid orchid and other rare plants, including sedges and grasses.
Thriving forest pests and melting glaciers may make parks a warning system for climate change effects.
Scientists carrying out the ambitious program on Rat Island hope to return the volcanic outcropping in the Aleutian chain to its original splendor as a seabird paradise.