Some Of Earth's Lowest Air Pollution Levels Found In Western Colorado TownAn area on Colorado's Western Slope has some of the globe's lowest air pollution levels, according to a new study from the World Health Organization.
From Springs To Wyoming Line, Colorado Flunks Ozone RatingsThe Colorado Front Range from Colorado Springs to Greeley and Fort Collins gets a failing grade on ozone pollution, an annual report card on air quality said Wednesday.
Hickenlooper Tests AG Coffman's Power To Sue Federal GovernmentGov. John Hickenlooper asked the Colorado Supreme Court on Wednesday to rule that he, not the state's attorney general, has the final say on whether to sue the federal government.
Colorado Faces Tougher Limit Under New Smog RulesThe Environmental Protection Agency has listed metro Denver and 10 other cities as failing to meet federal smog standards after seven years.
State Issues Another Wildfire Smoke Health AdvisorySmoke from Canadian wildfires is lingering over Colorado on Wednesday, and a smoke advisory for areas east of the Continental Divide is once again in effect on Wednesday.
A Health Alert For Your Heart And Lungs: How To Protect YourselfThe Colorado Department of Public Health and Environment has issued an Action Day Alert for areas east of the Continental Divide because of unhealthy air quality due to wildfires in Canada. CBS4's Dr. Dave Hnida explains what steps you should take to protect your health.
Supreme Court Seems Divided Over EPA Mercury LimitsThe Supreme Court's conservative justices cast doubt Wednesday on the Obama administration's first-ever regulations aimed at reducing power plant emissions of mercury and other hazardous air pollutants.
Strong Inversion Puts Denver Under A Brown CloudDepending on your view of Denver and the Front Range on Tuesday, you might have seen the infamous brown cloud hanging over the region.
Opponents, Supporters To Discuss Clean Air RulesHundreds of people will tell the Environmental Protection Agency what they think of proposed rules to cut pollution from power plants during public hearings Tuesday and Wednesday in Denver.
Big Research Effort Will Track Colorado OzoneResearchers say an intensive campaign to measure air pollution along Colorado's northern Front Range will produce a wealth of data to help identify the sources and levels of ozone.
Colorado Governor Touts Air Pollution RulesColorado Gov. John Hickenlooper is touting the state's new air pollution curbs on the oil and gas industry - but he insists that local efforts to curb drilling run afoul of constitutional property rights.
Colorado Air Pollution Hearings Continue Colorado health officials have extended air pollution talks through the weekend on a sweeping plan to reduce air pollution from oil and gas drilling.
Colorado Opens 4 Days Of Air Pollution HearingsNew air pollution rules for Colorado's oil and gas industry go up for public comment Wednesday.
Colorado Governor Plans Lawsuit Over Drilling BansEnvironments are concerned after Gov. John Hickenlooper said Colorado has an obligation to sue Fort Collins over banning oil and gas development within its city limits.
Group Seeks Court Review Of Colorado Haze PlanAn environmental group is asking a federal appeals court to review part of Colorado's plan for cutting air pollution and haze.