The EPA and Colorado Department of Public Health and Environment accuse Denver-based DPC Energy, Inc., of failing to control air pollution at dozens of oil tank sites.
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New Mexico sued Colorado in June 2016, saying Colorado should be held responsible for the contamination as well as decades of toxic drainage from other mines.
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Compilation says education and family planning are just as important as renewable energy as solutions to global warming.
Some 300 gallons of toxic water are released each minute from the site above the town of Silverton.
The authors of a new paper in The Proceedings of the National Academy of Sciences say that to get to zero emissions, the country should look beyond wind, solar and hydropower.
In April it appeared the national monument would be among those reviewed by the Interior Department, at the direction of President Donald Trump.
Colorado's top regulator says as long as the rules are followed, “there’s very little risk, very little potential harm of having empty, abandoned, plugged, capped lines in the subsurface.”
“Generation Wild” aims to use the magic of advertising to get kids off the iPad and out the back door.
The agency started work on safety standards after the spill and expects to soon finish them, investigators from the EPA's Office of Inspector General said.
Gov. John Hickenlooper says he thinks Colorado can reach the emissions goals set in Paris, but calls the emissions targets "ambitious."
“Most of us never thought we would see a time when basic monitoring would be something that could be on the table in terms of cuts,” said INSTAAR director Jim White.
A report from the Colorado School of Public Health says there were at least 116 incidents between 2006 and 2015.
You would be forgiven for thinking that Colorado and surfing don't really go together. Except they do on the South Platte River.
Cities along the Front Range are growing rapidly and the state’s 54,332 oil and gas wells aren't going anywhere.