U.S. Secretary of State Hillary Rodham Clinton seeks to jumpstart the U.N. climate talks, saying the U.S. would help raise $100 billion a year to help poorer nations if a broader pact is reached.
U.N. climate negotiators look to the U.S. to bring fresh ideas to try to salvage a bare-bones political agreement by the end of the week on controlling global warming.
A warning to delegates in Copenhagen: If you're looking for President Barack Obama to cave to pressure and deepen U.S. efforts to curb greenhouse gases, don't bet on it.
An animal protection group asked a federal judge Wednesday to block a plan to round up about 2,500 wild horses to remove them from a Nevada range.
Global warming in this century might raise sea levels more than expected in future centuries, says a study that looked at what happened at a time when Neanderthals roamed Europe.
If they fail to reach a climate deal in Copenhagen, world leaders flying in their private jets and huddling in five-star hotels will have little to show beyond a big carbon footprint.
Automakers are promising that affordable plug-in hybrid electric vehicles will be available in the next couple of years, but a new report contends that it will be decades before the fuel savings and lower emissions make up for the high cost of batteries.
Cities around the country discover energy-efficient traffic lights don't burn hot enough to melt snow covering them — a problem blamed for dozens of accidents and at least one death.
The Obama administration unveils an agreement with the dairy industry to reduce the industry's greenhouse gas emissions 25 percent by 2020, mostly by capturing the methane from cow manure.