California utility PG&E Corp. said Monday that it plans to file for bankruptcy over what it estimates could be $30 billion in potential liability costs from recent wildfires. Here, transmission towers in a valley near Paradise, Calif., as the Camp Fire burns in November 2018. David Paul Morris/Bloomberg via Getty Images hide caption
Drilling at the Conoco-Phillips Carbon location in the National Petroleum Reserve, Alaska. Judy Patrick/AP hide caption
Flames burn near power lines in Montecito, Calif. State fire officials say power lines coming into contact with trees sparked four Northern California wildfires last October. Mike Eliason/AP hide caption
The Camp Fire leveled homes in the Ridgewood Mobile Home Park retirement community late last year in Paradise, Calif. The state's largest utility, PG&E, may face billions in liability costs if its equipment is found to be responsible for igniting the fire. Noah Berger/AP hide caption
The farewell letter that former Interior Secretary Ryan Zinke posted to Twitter was barely legible, although he did also type out his missive. Carolyn Kaster/AP hide caption
David Bernhardt, a former oil-industry lobbyist and a polarizing figure, will lead the Department of the Interior for now as Ryan Zinke steps down. David Zalubowski/AP hide caption
The Trump administration EPA says regulations to reduce power plant emissions of mercury and other hazardous air pollutants are too costly and should no longer be considered legally "appropriate and necessary." Matt Brown/AP hide caption
The Trump administration has taken another step toward selling leases to drill oil in the Arctic National Wildlife Refuge. In this photo from the U.S. Fish and Wildlife Service, caribou migrate onto the coastal plain of the refuge in northeast Alaska. U.S. Fish and Wildlife Service/AP hide caption
Interior Secretary Ryan Zinke faced the prospect of congressional probes after newly elected Democrats take majority control of the House. Pablo Martinez Monsivais/AP hide caption
A massive fire roars through a neighborhood in San Bruno, Calif., after a PG&E gas pipeline ruptured, killing eight people, in 2010. Paul Sakuma/AP hide caption
Downed trees mark the route of the Atlantic Coast Pipeline in Deerfield, Va., in February. A federal appeals court has blocked development of portions of the pipeline. Steve Helber/AP hide caption
Just outside of Paradise, the charred remains of the Camp Fire stops just short of a home that survived the blaze. Adam Grossberg/KQED hide caption
Carbon Engineering CEO Steve Oldham stands in front of the company's Squamish, British Columbia, pilot plant. It uses a chemical process to extract carbon dioxide from the air and turn it into a fuel similar to crude oil. Jeff Brady/NPR hide caption
OPEC President Suhail al-Mazrouei speaks Friday at OPEC headquarters in Vienna. OPEC, Russia and other producers have agreed to cut production, ignoring pressure from President Trump. Joe Klamar/AFP/Getty Images hide caption
The greater sage grouse is viewed as an "indicator" species for the health of the sagebrush steppe ecosystem. Tom Koerner/U.S. Fish and Wildlife Service hide caption
The Trump administration wants to ease an Obama-era rule that required coal plants to use expensive technology to control carbon emissions. Branden Camp/AP hide caption
Dungeness crab like these, caught off the coast of Alaska, have been affected by the neurotoxin domoic acid because of algae blooms in recent years, which makes them unsafe to eat. Michael Melford/Getty Images hide caption
Scientists are concerned the seismic activity could harm animals such as humpback whales. Eva Hambach/AFP/Getty Images hide caption
Leoyla Cowboy was among the many indigenous people from around the world who came to North Dakota to participate in the Dakota Access Pipeline protests. Jeff Brady/NPR hide caption
A "Yellow Vest" protester waves a French flag in Villefranche-sur-Saone on Saturday, during a demonstration against high fuel prices. Jeff Pachoud/AFP/Getty Images hide caption
Workers at a Wold Energy Partners well pad in Wyoming place gravel where oil tanks will soon stand. A spike in drilling in the state is getting a boost from new lease sales on public land. Cooper McKim/Wyoming Public Media hide caption
The London skyline, shown in March 2017, is still shining bright. But the U.K. is using noticeably less energy than it did more than a decade ago. Dan Kitwood/Getty Images hide caption