One government report estimates 33,000 hard rock abandoned mines are causing environmental problems across the West.
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State regulators deny accusations that the fines are part of an effort to put small drillers out of business.
Melting ice has made it harder to hunt walrus, a traditional staple for Alaska Natives. Warmer temps mean caribou aren't where hunters used to find them. It all adds up to more food insecurity.
The agency says the lesser prairie chicken’s future may still be in peril.
It turns out that turtles didn’t evolve their shells to protect themselves.
Climate Central also expects NWS-designated danger days of high heat to more than double across the country by 2050.
That acreage is part of the historic Medano Ranch, which is owned by the Nature Conservancy.
That's the price for a solar energy package from Off-Grid Electric, who's lit up the homes of 100,000 people without electricity in Tanzania.
"New Mexico and its citizens are now paying the price" of last year's mine spill near Silverton, that state's attorney general says.
A U.S. judge in Wyoming said the Bureau of Land Management can't regulate hydraulic fracturing — because more than a decade ago, Congress specifically excluded fracking from federal oversight.
Hundreds of people have evacuated their homes because of fires in California, New Mexico and Arizona. A heat wave across the region is contributing to the problem — and in some cases, setting records.
Gov. John Hickenlooper signed legislation last month making the barrels legal. The law goes into effect Aug 10.
Across the U.S. and European populations, about 99 percent of people live under light-polluted skies. But the western U.S. is relatively dark.
The USGS said the Mancos Shale formation holds about 66.3 trillion cubic feet of gas, up from 1.6 trillion estimated in 2003.
California has so much solar energy that some days, there's too much. One solution is to join forces across state borders. But in the West, that's sparking some not-so-neighborly opposition.