President Trump on Monday signed an executive order to withdraw the United States from the Paris Agreement, the pact among almost all nations to fight climate change. By withdrawing, the United States will join Iran, Libya and Yemen as the only four countries not party to the agreement, under which nations work together to keep […]

At the height of the Los Angeles County wildfires, atmospheric concentrations of lead, a neurotoxin, reached 100 times average levels even miles from the flames, according to early detailed measurements obtained by The New York Times. Levels of chlorine, which is also toxic at low concentrations, reached 40 times the average. The spiking levels underscore […]

Chris Wright, Donald J. Trump’s pick to lead the Department of Energy, landed the job during his first encounter with the past and future president. The founder and chief executive of Liberty Energy, a fracking services company based in Colorado, Mr. Wright was among about 20 oil and gas executives whom Mr. Trump gathered at […]

For the first time, the Environmental Protection Agency on Tuesday warned that “forever chemicals” present in sewage sludge that is used as fertilizer can pose human health risks. In a groundbreaking study, the agency said that while the general food supply isn’t threatened, the risk from contaminated fertilizer could in some cases exceed the E.P.A.’s […]

From above the raging flames, these planes can unleash immense tankfuls of bright pink fire retardant in just 20 seconds. They have long been considered vital in the battle against wildfires. But emerging research has shown that the millions of gallons of retardant sprayed on the landscape to tame wildfires each year come with a […]

It kills more people each year than car crashes, war or drugs do. This invisible killer is the air pollution from sources like cars and trucks or factory smokestacks. But as wildfires intensify and grow more frequent in a warming world, the smoke from these fires is emerging as a new and deadly pollution source, […]

The Biden administration on Friday made final its long-awaited plan to offer billions of dollars in tax credits to companies that make hydrogen, in the hopes of building up a new industry that might help fight climate change. When burned, hydrogen mainly emits water vapor, and it could be used instead of fossil fuels to […]