To wean itself off Russian natural gas, Europe has found new sources of energy, including imports from the United States. But high costs are straining the economy.

Preliminary data from the first few weeks of New York City’s tolling plan show a possible uptick in traffic in the neighborhood.

Faced with a rash of shark deaths marked by brain swelling, Canadian and American scientists are trying to solve a marine mystery.

In announcing a $35 billion program to bring inexpensive solar power to some 300 million Africans, officials left out two words: climate change.

Some oil refineries will probably struggle to replace imported crude oil if President Trump imposes 25 percent tariffs on products from Canada and Mexico.

The former governor of North Dakota is promoting President Trump’s “energy dominance” agenda and wants more oil, gas and mining on public lands.

Executive orders and announcements by President Trump have put billions of dollars in U.S. climate commitments into question.

A court ruling requires the British government to consider the potential climate impact of the oil and gas produced in the North Sea.

Their feathers, roosting behaviors and adaptability help birds survive the cold, “nature’s proving ground.”

The Bulletin of the Atomic Scientists shifted the hands of the symbolic clock to 89 seconds to midnight, citing the threat of climate change, nuclear war and the misuse of artificial intelligence.

After a flood destroyed their town, Kentucky residents faced the agonizing choice of whether to stay or to relocate to new communities built on former strip mines.

The president, who has assailed California’s leaders over wildfires, issued the directive in an executive order that was dated Friday but released on Sunday.

The early days of the transition have been marked by dismissals and dread.

Are those green bags that claim to be compostable really better for the environment? We’ve got the scoop.

Through a flurry of orders, the new president quickly began driving the country in a different direction on many contentious issues.

After a tour of areas damaged by the California wildfires, the president sparred with local leaders and blamed them for a wide variety of issues affecting the disaster response.

Top political appointees are already at the E.P.A. preparing to erase the agency’s climate rules and pollution controls. Many of them have tried it before.

On President Trump’s first day in office, he pulled out of the Paris Agreement, a pact among nearly all nations to fight climate change. Reporting from Davos, Switzerland, David Gelles, a climate journalist for The New York Times, explains what this decision means for the rest of the world.

The president wants to honor a predecessor, William McKinley, by returning his name to North America’s highest peak. The state’s senators prefer the Native name.