Sea ice extent in the Arctic has decreased by about 40 percent since 1979. New technologies are being deployed to regrow it.

Installations are wrapping up this month for the turnkey program providing solar, heat pumps, and batteries to households that couldn’t otherwise afford them.

So if it’s perfectly safe to consume recycled toilet water, why aren’t Americans living in parched western states drinking ...

Some $380 million is now in limbo after Trump laid off staff that run a program helping low-income people pay their energy ...

The summer of 2021 was brutal for residents of the Pacific Northwest. Cities across the region from Portland, Oregon, to Quillayute, Washington, broke temperature records by several degrees.

If you were to drink improperly recycled toilet water, it could really hurt you — but probably not in the way you’re thinking. Advanced purification technology so thoroughly cleans wastewater ...

The Agriculture Department is opening more than 112 million acres of federal forests to logging in a misguided bid to prevent fires and boost timber production.

New Yorkers can now get fined for not separating their food scraps. Some critics say that's not the right approach.

Last month, France’s national railway operator released a glimpse of the designs for its upcoming fifth-generation high-speed ...