Environment

Colorado oil and gas companies are routinely violating the Clean Air Act by drilling at sites along the Front Range, activists say.

A major court fight over a controversial oil and gas practice is on hold after activists and state regulators reached an agreement that both sides are happy with — for now.

The number of avalanches that led to fatalities or close calls in Colorado this season is on pace to set a disturbing record.

Residents of Commerce City urged their city council not to approve a massive fracking proposal, the latest project that sees drillers moving closer and closer to dense urban areas in and around Denver.

Will state legislators finally shift the balance of power away from the oil and gas industry and toward residents that the law has long left powerless?

More Coloradans and Western voters support conservation efforts than ever before.

On Thursday Polis signed his first executive order as governor, directing state agencies to take steps to help accelerate Colorado’s transition to electric vehicles.

I propose that all of the “green organizations” mobilize, collaborate and work together in a massive action.

The contents of those files would aid in an audit of the cleanup of the former nuclear weapons plant.

The effect of the government shutdown on Rocky Mountain National Park goes well beyond uncollected trash and uncleaned restrooms.

“Don’t get too comfortable in your blue sneakers. Blue sneakers can step in shit just like boots can.”

The federal government on Thursday leased thousands of acres of Colorado’s public lands for oil and gas development — but far fewer than it originally wanted to.

A Boulder activist was among protesters who stopped a Trump administration climate panel talk in Poland with laughter.

Two Arvada grandmothers started the organization two years ago, to help educate the public.

Do your homework: Would you live in a house with an 80007 zip code?

Brownstein has served as fiduciary counsel to PERA’s board of trustees since 2011.

Residents of the 80007 zip code may not know they’re living near a former nuclear weapons plant.

The former nuclear weapons plant opened to the public in September as a wildlife refuge.

Dr. Kevin Fitzgerald offers tips to living with urban wildlife in cities like Denver and beyond.

The addition will be part of the course’s stormwater diversion project.

It’s mostly oil and gas companies, not individual Coloradans.

Dr. Kevin Fitzgerald reveals the kinds of diseases carried by urban wildlife in Denver.