Colorado air pollution director Garry Kaufman reassigned after conflict of interest investigation
A special investigator found a failure to report professional conflict and raised questions about Colorado’s pollution modeling. Kaufman is moved to a newly-created job less than a month later.
Whistleblowers raised valid concerns about Colorado air pollution monitoring, probe finds, but problems were unintentional
An independent investigation commissioned by the Attorney General also says boss of Air Pollution Control Division should have disclosed his prior work for Newmont Corp. when a pollution permit for a Teller County mine came before him.
WHO says air pollution caps should be much tougher in Colorado, U.S.
Influential world health monitor issues strict guidelines calling for steep cuts to ozone and particulate PM2.5 emissions in Front Range counties that saw sharp spikes in both this past summer.
A new rule to slash oil and gas emissions appeals to the industry, but Colorado activists worry it won’t work
The proposed "intensity target" rule aims to slash carbon emissions from the oil and gas industry by 60%. But the targets are based on data that doesn’t exist.
Opinion: Environmental justice led the way in Colorado’s legislative session
Lawyered up, educated and networked, we’re equipped to make even more progress together
Here’s what you need to know about Colorado air pollution — and what you can do about it
A heat wave spikes ozone levels to “Unhealthy” on the Front Range, and Sun readers have questions. We sought some of the top air experts in the state for your answers.
Some of the worst ozone pollution in the U.S. settles along the Front Range. New rules to fix it are ahead.
Colorado has made some progress toward reducing the chemical dangerous to human health. But it will take leaning on automobiles and oil and gas producers to really move the needle.
Wildfire smoke accounted for up to half of air pollution in the West in recent years
Gains made from cleaner power plants and vehicles were lost to massive wildfires that charred landscapes, including massive burns in Colorado
Opinion: Xcel’s plan for transportation electrification is a win for consumers and for clean air
Three coal-burning power plants in Colorado face orders to close early. Their owners aren’t happy about it.
Tri-State, Xcel and Platte River Power had the closures slated for 2030. But Colorado air quality regulators say it must be done earlier to meet greenhouse gas targets.
Air pollution, asthma rates in Colorado’s San Luis Valley are a growing concern
About 14% of San Luis Valley children suffer from asthma, which is a medically significant higher number than the 12% U.S. average. Can monitoring air quality help?
Opinion: Progress is slow on reducing Colorado’s air pollution, but there are signs of movement
Colorado regulators probe why the coal-fired Comanche 3 power plant has been out of service for months
Xcel Energy customers have been paying for the $1.3 billion plant since it opened in Pueblo 10 years ago and now are picking up the tab for costly repairs and electricity purchased to meet summer demand
Opinion: Let’s end the wasteful practice of routine venting and flaring from oil and gas sites
Opinion: For our children’s future, we must vote for our climate
Colorado oil and gas emissions rules begin to tighten, but gaps open over what is monitored, by whom and where
Western Slope commissioners say rules designed to pull the Front Range into federal ozone compliance are an “economic risk” for northwest Colorado
Opinion: Colorado must protect and support communities hurt by pollution
Six months after historic Suncor settlement, community around Commerce City refinery still feels “exploited”
The oil company began surveying the community on Wednesday, but continued issues at the refinery have neighbors feeling skeptical