Coal-related interests are suing to block the centerpiece of Gov. Tom Wolf’s plan to fight climate change, a carbon-pricing policy that will impose a cost for emitting planet-warming carbon dioxide from fossil fuel-fired power plants

More than two years after he started work on it, Gov. Tom Wolf is set to enact the centerpiece of his plan to fight climate change

Council members in Pittsburgh have voted unanimously to ban single-use plastic bags at businesses in a year

Republican candidates for Pennsylvania governor are pledging to open up natural gas production, but there are constraints to what a governor can do

Gov. Tom Wolf’s administration is asking the state’s highest court to let the centerpiece of his plan to fight climate change take effect and make Pennsylvania the first major fossil fuel state to adopt a carbon pricing policy

A Pennsylvania court is blocking the centerpiece of Gov. Tom Wolf’s plan to fight climate change, the latest challenge to the Democrat’s effort to make Pennsylvania the first major fossil-fuel state to adopt a carbon pricing policy

Pennsylvania’s Republican-controlled Legislature has failed in a last-ditch effort to block the centerpiece of Gov. Tom Wolf’s plan to fight climate change, a regulation requiring fossil fuel-fired power plants to pay a price for every ton of carbon dioxide they emit

The first public appearance between the highest-profile Republicans running for U.S. Senate in Pennsylvania quickly became chippy

One of the best-known pollution cases ever to emerge from the U.S. drilling and fracking boom has entered a difficult new phase as prosecutors pursue criminal charges against Pennsylvania’s busiest gas driller