"The United States and the state of California have reached an agreement in principle with the truck engine manufacturer Cummins on a $1.6 billion penalty to settle claims that the company violated the Clean Air Act by installing devices to defeat emissions controls on hundreds of thousands of engines, the Justice Department announced on Friday."

"The Treasury Department released heavily anticipated tax guidance Friday that would force companies to use low-carbon or zero-emissions energy to power the hydrogen production process — a move designed to keep emissions in check for the emerging industry."

"Most of the United States can keep dreaming about a white Christmas, as it likely won’t happen."

"From Alaska to the Gulf Coast, the oil and gas industry and its allies scored key victories in legal battles this year to advance fossil fuel development over green groups’ claims that project approvals violated a bedrock environmental law."

"The country may have a long way to go in its decarbonization goals, but these stories show signs of progress."

"Punishing heat that" hovered and hung on much longer than usual. Flash floods that washed away large swaths of land and life. And wildfires that burned much of the year, leaving a wake of smoke and charred earth."