Colorado is now in severe violation of two federal ozone pollution standards, and it must find a way to reduce that pollution ...

Colorado has consistently failed to meet federal standards for ground-level ozone across the Front Range where 3.3 million ...

A federal appeals court ruled against Trump’s Environmental Protection Agency today, determining that the agency illegally approved a Colorado rule that allows the oil and gas industry to release ...

The Environmental Protection Agency failed to justify its approval of Colorado’s air plan that omits construction operations ...

EPA improperly allowed the state to not consider air pollution from drilling operations in its implementation plan for ...

The nightclub had moved between several Colorado Springs addresses, but had been inside the building raided by federal ...

Plastic is made from chemicals derived from fossil fuels, the burning of which drives the climate crisis by producing ...

As attorney general, Shapiro spoke then of a “profound gap” between Pennsylvanians’ constitutional right to clean air ... pollution exposure. It argued that no more proof is needed that ...

High-tech camera reveals the pollutants spewing into the atmosphere, providing evidence for the state to investigate gas and oil operators.

"In addition to its climate impact, it's also contributing to air and water pollution during the drilling and fracking process and toxic emissions that come out of the plastic production plant.

The request came in response to an EPA offer to consider exemptions to new air pollution rules that covered ... plants have sprung up near the fracking fields of Pennsylvania, West Virginia ...