The announcement comes a day before a Paris gathering called the "One Planet Summit" co-hosted by the U.N. and the World Bank.
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The state hasn't taken enforcement action in the Firestone deaths, citing the lack of rules covering fatal accidents in the oil and gas industry.
The Native American Rights Fund represents three of the five American Indian tribes suing President Trump over his proclamation to shrink the national monument.
Colorado’s average temperature for the month was just over 41 degrees, nearly 8 degrees above the state's average for the entire 20th Century.
The City Council's action does allow for oil and gas developers to continue work if their development was already approved.
Manure runs downhill. It’s just a matter of where it ends up.
How do you balance homeownership, mineral rights and local control?
The Federal Energy Regulatory Commission is expected to rule early next year on what would be the biggest public works project in Boulder County history
"It was one of the most exciting things I’ve ever done," Bill Nye says.
Town council passed a similar resolution in August, stating the town's commitment to having all town facilities powered by renewable resources by 2025.
CDOT wants to expand the service along the Front Range and through the mountains, including a possible Frisco-to-Steamboat Springs route.
The company says it complied with regulations when it was shutting down one well now deemed to be too close to Aspen Ridge Preparatory School in Erie.
Delegates to the annual international climate meeting held by the U.N. are struggling to forge a unified approach to slowing climate change. Meanwhile, emissions of greenhouse gases keep rising.
The UN Environment Program report tallied 40 significant mine waste accidents in the past decade. Most involved dams or other storage areas that failed.
Last year, the Colorado Supreme Court tossed out drilling restrictions imposed by Longmont and Fort Collins, ruling that only the state could regulate the industry.