Colorado Already Has Methane Curbs Tougher Than ProposalStrict limits on methane emissions passed a year ago in Colorado mean the state's energy producers will not be affected by the federal government's new plan to crack down on the powerful greenhouse gas.
Fighting Denver's Brown Cloud Could Mean 'Action Days' This WinterBrown clouds are common along the Front Range on very cold days with little wind to mix the atmosphere.
Air Quality In Jefferson And Douglas Counties Gets An "F"The American Lung Association put out its annual report on Wednesday. It assigns letter grades to counties along the Front Range. The grades are based on information gathered from air monitoring stations.

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