A do-not-drink order remains in effect for tap water in a section of northwest Washington due to contamination from a petroleum product that remains in the system.
The National Hockey League has partnered with the top energy provider Constellation to work on becoming the first major sports league to go carbon-neutral, the league announced Thursday.
People buying all-electric cars where coal supplies the power may think they are helping the environment. But a new study says those plug-in vehicles can be making the air dirtier and worsening global warming.
A last-minute deal that salvaged U.N. climate talks from collapse early Sunday sends a signal the rich-poor divide that long held up progress can be overcome with a year to go before a landmark pact is supposed to be adopted in Paris.
A northern white rhinoceros that was only one of six left in the world has died at the San Diego Zoo Safari Park.