The E.P.A. issues a regulation that will sharply reduce the use of HFCs, a powerful driver of climate change.

The Environmental Protection Agency is expected to issue a final regulation on Thursday morning that will slash the use of hydrofluorocarbons, widely used in air-conditioning and refrigeration.

The E.P.A. issues a regulation that will sharply reduce the use of HFCs, a powerful driver of climate change.

The Environmental Protection Agency is expected to issue a final regulation on Thursday morning that will slash the use of hydrofluorocarbons, widely used in air-conditioning and refrigeration.

Biden Outlines a Plan for Cleaner Jet Fuel. But How Clean Would It Be?

Some biofuels may contribute to greenhouse gas emissions in ways that can significantly reduce, and sometimes offset, their advantages over fossil fuels, studies have shown.

Biden Administration Moves to Protect Alaska’s Bristol Bay

The bay, home to a key sockeye salmon fishery, sits atop a massive gold and copper deposit, pitting environmentalists against mining companies.

Lack of Power Hinders Assessment of Toxic Pollution Caused by Ida

More than 100 industrial sites that handle large amounts of hazardous substances are in and around parishes still without power.

Federal Judge Strikes Down Trump Rule Governing Water Pollution

The rule allowed fertilizers, pesticides and industrial chemicals to flow into small streams, marshes and wetlands. The judge warned of environmental harm.

Federal Judge Strikes Down Trump Rule Governing Water Pollution

The rule allowed fertilizers, pesticides and industrial chemicals to flow into small streams, marshes and wetlands. The judge warned of environmental harm.

Opinion | The Proliferation of Plastics and Toxic Chemicals Must End

As we confront climate change, focusing on a single metric, like greenhouse gas emissions, could leave other harmful practices unaddressed.

Is the Party Over for New York’s Outlaw Houseboats?

Newtown Creek, a polluted waterway, could be dredged, meaning the end of an era for the adventurous community it inspired.

E.P.A. to Block Pesticide Tied to Neurological Harm in Children

The agency will reverse a Trump-era decision to keep chlorpyrifos, one of the most common pesticides, in use.

Biden, in a Push to Phase Out Gas Cars, Tightens Pollution Rules

The president is restoring and strengthening tailpipe emissions regulations from the Obama era and has set a target that half of all vehicles sold in the United States be electric by 2030.

Biden’s Climate Plans Are Stunted After Dejected Experts Fled Trump

Hundreds of scientists and policy experts left the government during the Trump administration. The jobs remain unfilled six months into President Biden’s term.

E.P.A. Approved Toxic Chemicals for Fracking a Decade Ago, New Files Show

The compounds can form PFAS, also known as “forever chemicals,” which have been linked to cancer and birth defects. The E.P.A. approvals came despite the agency’s own concerns about toxicity.

Here’s How Biden Aims to Increase Electric Car Sales

The president wants to use pollution rules to rapidly lift sales, but there are hurdles ahead.

Here’s How Biden Aims to Increase Electric Car Sales

The president wants to use pollution rules to rapidly lift sales, but there are hurdles ahead.

E.P.A. to Review Rules on Soot Linked to Deaths, Which Trump Declined to Tighten

The Biden administration says it will consider tougher limits on a deadly air pollutant that disproportionately affects low-income and minority communities.

Biden Administration to Restore Clean-Water Protections Ended by Trump

The Environmental Protection Agency announced it would repeal a Trump-era rule that weakened pollution controls for wetlands and streams.

Here Are America’s Top Methane Emitters. Some Will Surprise You.

Oil and gas giants are selling off their most-polluting operations to small private companies. Most manage to escape public scrutiny.

E.P.A. to Modify Trump-Era Limits on States’ Ability to Oppose Energy Projects

In recent years, states have used the Clean Water Act to block pipelines and other fossil fuel projects. The Trump administration tried to curb that power.