Whales with stomachs full of plastic have turned up around the world. Here's what we know.
Amid federal inaction, there's no consensus on how much of the PFAS class of chemicals is too much.
But pollution from shale gas operations and other industries in southwestern Pennsylvania continue causing hundreds of deaths annually.
The metal was produced at Alcoa’s technical center in Westmoreland County through a joint venture with aluminum maker Rio Tinto.
In the haze of the California wildfires, a Native American tribe's independent electricity grid saved the day. Is a new model for energy in America rising from the ashes?
Perdue, Vilsack and leading agricultural groups gathered in a Maryland barn to talk about the farm-country issue that dare not speak its name.
Researchers had young people document things around them that might be contributing to lung ailments in a region with the nation's worst lung disease rates.
The world's forests are getting drier and people are living closer to them, ushering in a dangerous new era—unless we can find a way to coexist with the flames.
Everyday Republicans could turn the corner if enough GOP elites acknowledge the crisis.
A majority of Americans still buy into the “do good” movement. But the number of people acting on it is in decline. How can we reverse the trend?