A high pressure system is moving over the Western United States and the Rocky Mountains, bringing with it hot, stagnant air. Temperatures are forecast to be 10-15 degrees above normal.

The nonprofit announced the winners of its annual Keeling Curve Prize on July 1 in Aspen. It also showcased past laureates, who credited their success to receiving the award.

More than 56 million acres — nearly 3% of the U.S. landmass — belong to tribes. The Land and Water Conservation Fund has aided more than 47,000 projects, like parks and trails, in nearly every county nationwide.

Wildfires burning in Utah and Colorado have sent smoke across the Western Slope, prompting air quality advisories. Public health officials say to treat smoky skies like bad weather.

Wildfires across the West have spread rapidly due to extreme fire conditions, putting a strain on firefighting resources.

Michael Bennet and Phil Weiser are trying to set themselves apart from one another in the final days of the gubernatorial primary, despite similar views on environmental issues in Colorado.

Critics say the BLM’s proposed policies would make it easier for oil and gas companies to shift the financial cost of cleaning up retired, polluting wells to taxpayers.

Federal land officials are considering whether to remove almost 2,000 wild horses from Wyoming's Red Desert. They say the population has exceeded appropriate levels for the habitat, potentially leading to environmental harm.

The Western Slope electric utility sourced enough renewable power in March to match total member demand, but it still occasionally leaned on fossil fuels. By 2030, it hopes to eliminate those climate-warming sources entirely.

Utah’s congressional delegation attempted to use the Congressional Review Act to overturn the management plan for nearly 2 million acres of the Southern Utah monument. They have now run up against a 60 day time limit for the procedural maneuver.