WASHINGTON — The Obama administration on Friday set the first national standards for waste generated from coal burned for electricity, treatin…
Vegetation greened up from Mexican border down to the Sea of Cortez.
LOS ANGELES — Ornithologist Henry Streby was happy enough that a song bird weighing less than two nickels managed to carry a tiny electronic s…
ALBANY, N.Y. — Handing environmentalists a breakthrough victory, New York plans to prohibit fracking for natural gas because of what regulator…
Air temperatures at the top of the world continue to rise twice as fast as temperatures in lower latitudes, causing significant ice melt on la…
WASHINGTON — Incoming Senate Majority Leader Mitch McConnell, R-Ky., pledged on Wednesday to do all he can to stop President Barack Obama’s co…
Lawsuit asks court to proclaim Fish and Wildlife erred in delisting the animal.
Still uncertain why they are here, if climate change is a factor.
Studies project major future declines and some increases in birds' ranges.
They're now allowed to roam only in Eastern Arizona, southwest New Mexico.
Fourteen bighorn sheep were released into the Catalina Mountains this morning.
Household water use data is not public information in Arizona
The far-northeast-side tract uses triple the citywide average water use.
Regional temperatures expected to increase, experts say.
Park is the first state park in Arizona to receive the designation.
Oracle State Park has been granted International Dark Skies status. Take a look at the park over several years.
Small businesses and curb cuts will be eligible by July.
But the 600 who have received them aren't actually using less water.
Its collar resembles those on endangered gray wolves, says Fish and Wildlife Service.
Wildlife officials plan capture and release in late November.
Land-use agreements will protect vital wildlife corridors from development.
City aquifer called stable, but some worry more problems lurk in future.
Part 1: Recycled bottles help rebuild reservation, one man's life
Toxic heavy metals may have leached into the water during heavy rains.
After 25 years running Trees for Tucson, Joan Lionetti honored with oak.