Few issues are as divisive among American environmentalists as nuclear energy. Concerns about nuclear waste storage and safety, particularly in the wake of the 1979 Three Mile Island reactor meltdown in Pennsylvania, helped spur the retirement of nuclear power plants across the country. Nuclear energy’s proponents, however, counter that nuclear power has historically been among the safest forms of power generation, and that the consistent carbon-free energy it generates makes it an essential tool in the fight against global warming.

Climate-warming greenhouse gasses from natural gas could be as damaging as those from coal, according to a new analysis.

Nearly two-dozen states will have to cut harmful industrial emissions of nitrogen oxide and other pollutants, improving air quality for millions of people living in downwind communities.