A new map of climate conditions during the Pliocene epoch—the last time Earth’s carbon dioxide concentrations hit 400 parts ...

Climate change is making Phoenix increasingly unsafe for outdoor workers like my dad. We need protections from the heat now ...

It’s not just Florida and California — from poisoned water supplies to infrastructure issues to polar vortices, Holly Baxter ...

Central Arizona is preparing for more intense droughts and floods through major water projects with federal support.

Russell Scofield remembers when federal officials first started getting applications to build solar farms on public lands. It ...

The pause affects billions of dollars and is delaying home repairs, factory construction and other projects, many in states ...

Doug Burgum’s order would hobble clean energy development, hinder protections for migratory birds and endangered species and ...

Climate change will cause a $1.47 trillion decline in U.S. home values by 2055, according to a new study from climate-research company First Street. Rising home-insurance costs and more homeowners ...

The number of monarch butterflies spending the winter in the western United States has dropped to its second-lowest mark in ...

Businesses are recognizing their responsibility to balance profit-making with contributing positively to the planet and society ...

WASHINGTON— Six of the nation’s largest utility corporations netted more than $10 billion in profits while disconnecting ...