The president signed four executive orders to reverse the trend away from coal-fired electricity in the U.S., but there's little economic incentive for utilities to bring it back when natural gas is so much cheaper.

New research shows high levels of a toxic byproduct linked to cancer and other health problems polluting drinking water across the U.S., including parts of the Mountain West. One of the main causes is manure runoff from livestock farms.

A new study reveals snow in the Rocky Mountains is contaminated with mercury and other metals, and that pollution has historic causes.

Much of southern Arizona and New Mexico are expected to see above average potential for wildfire in April.

NEPA regulates how federal agencies assess and report the environmental impacts of big projects, and provides for public participation. But new Trump administration rules and a Supreme Court case could weaken the law’s ability to provide transparency and environmental protections.

The mountain pine beetles have rebuilt their numbers amid dry and warm weather.

The percentage of adults in the West who say they’ve been personally affected by an extreme weather event, including wildfires and high heat, jumped 13% in the last two years.

In recent decades, wildfires have gotten larger and more intense, and community-destroying blazes are an increasingly common occurrence. But new research looking at centuries of wildfires shows that compared with fires in the 19th and earlier centuries, today’s blazes pale in comparison – at least in terms of size.

Lawmakers defunded the state’s two-decade program that also benefits downstream states. But they’re optimistic those states will pay for Wyoming’s share to keep it going.

A new scientific analysis shows spring is getting warmer across the U.S. because of climate change. Some of the fastest-warming cities are in the Mountain West, threatening to shrink water supplies and increase wildfire risk.