Quieter, cleaner electric school buses hit Phoenix streets
New electric school buses at Isaac Middle School
Arizona bees: A close-up look
Federal funds will help build PFAS treatment plants
Why it's so hard for some cities to get off groundwater
Mexican gray wolves released in Arizona's Sky Islands
Crews place the 100th Mexican gray wolf pup in a wild den 
Gray wolf puppies born in New Mexico arrive in AZU.S. Fish and Wildlife Service den diver explains gray wolf fosteringFive gray wolf pups born in Carlsbad, New Mexico are being fostered in Arizona
Demolition begins on one of the last major Western dams
What a La Niña would mean for Arizona's winter
Oceans are warming up quickly, climate scientists warn
Online payments help SNAP users buy more farm-grown food
Dozens of atmospheric rivers drench the West Coast
How to grieve and celebrate endangered life on Earth
Wildfire helicopter crew ignites Tonto National Forest
See wildfire crew launch aerial fire ignition
Phoenix ranks high for ozone pollution in new report
Why growing so much alfalfa helps, not hurts, ArizonaGina Dockstader and Paul Orme
When was the first Earth Day? Here's what to know
Could cloud seeding come to AZ? What we learned from Dubai
Judge denies tribes' request to block work on power line
Santa Cruz ranks fourth on most endangered rivers list
Apache Stronghold appeals Oak Flat case to full court