At issue is a loophole for major sources of pollution, such as refineries and steel mills, tied to plant emergencies. Federal judges have resurrected a legal shield for industries that violate Clean ...

President Donald Trump returned to western Pennsylvania Friday to announce an ending to the months-long saga to decide who would own the Pittsburgh-based steelmaking company U.S. Steel. But even as ...

For decades, the United States made steady progress in reducing surface ozone pollution, the main ingredient in smog. But ...

States across the US are looking to take major sources of pollution and use them to generate much-needed power.

Nitrate pollution has become one of the most widespread water quality challenges in intensively farmed regions around the world, threatening drinking water safety, aquatic ecosystems, and downstream ...

Unlike most other pollutants, particulate matter (PM) cannot be characterized by the space- and time-variations of the mass concentrations of a single compound. Important factors influencing PM ...

Many people who aren’t knowledgeable about cars might think that electric vehicles, having no tailpipe emissions, have little or no environmental impact compared to their combustion-powered ...

A new study reveals that urban tributaries flowing through Wuhan are significant sources of phthalate esters, a widely used class of plastic chemicals, to the Yangtze River, highlighting previously ...