President Trump has granted two-year reprieves to dozens of coal-fired power plants for meeting tougher emission standards, including one in Arizona.

Coal’s decline in U.S. power generation has slowed due to rising demand, but its long-term future remains uncertain without ...

Arizona’s intense summer heat puts a strain on the supply of electricity, and power companies have long turned to older, ...

At least 156 million Americans, about 46% of the population, live with unsafe levels of ozone, particulate pollution or both, ...

The South Dakota Public Utilities Commission (PUC) has rejected Summit Carbon Solutions’ plan to extend the company’s pending state permit application process for a proposed CO2 pipeline that would ...