When air quality on the Front Range is bad, it's often because of ozone - a gas created by a mixture of emissions from cars, oil and gas drilling and industrial facilities, combined with the heat and light from the summer sun.
The power politics of the Colorado River have long pitted families like Paul Bruchez’s against big cities. Under pressure from climate change, they might be finding a path out.
Beyond wildfire smoke, the air quality in Denver has deteriorated to exceptionally poor conditions with residents barraged by infusions of multiple lung-irritating pollutants - including ozone, which has spiked in recent days to levels 28% above federal health limits.
U.S. Rep. Joe Neguse is calling for an investigation to be reopened into allegations that the National Park Service tried to remove references to human-caused climate change from a University of Colorado researcher's report.
