Environment

Officials from around the world are meeting in Pittsburgh to discuss global climate change efforts. The event comes as leaders prepare to meet this fall for the next U.N. climate summit in Egypt.

Around 50,000 solar and battery power systems have been installed on homes in Puerto Rico in recent years, and most seemed to continue working during Hurricane Fiona.

Researchers compiled hundreds of studies of tree-dwelling and ground-dwelling ants to make their estimate of 2.5 million ants for every human.

Severe drought has states dependent on the Colorado River looking at alternatives. Desalinating seawater may be a viable supplement to some areas, but likely can't fix much of the river's deficit.

A stranded whale pod on Tasmania's west coast appears to be pilot whales and at least half are presumed to still be alive, local government officials said Wednesday.

The Senate is moving to ratify a climate treaty that would formally phase down the use of industrial chemicals found in air conditioners and refrigerators.

More than 760,000 customers have been left with no access to clean running water since Hurricane Fiona struck the island on Sunday.