More than three-quarters of U.S. wells make just 6% of the country's oil. They're called marginal wells because of their small output. But they're a big deal to oil producers and environmentalists.

A massive project headed by Elon Musk in Memphis, Tenn., to power AI has moved at breakneck speed. But it's stirring controversy around pollution emissions. The EPA says it’s looking into it.

The new fee is intended to encourage the oil and gas industry to lower emissions of methane and thereby avoid paying.

New EPA rules require oil and gas companies to slash climate-changing methane from their operations.

Oil and gas production is the nation's largest industrial source of methane, the main component of natural gas, and is a key target for the Biden administration as it seeks to combat climate change.

Scientists took a dozen research flights over major U.S. oil and gas fields to sample flare emissions. They found more methane than was supposed to be there.

A study builds on research that shows landfills are the third-largest source of methane emissions globally, after oil and gas systems and agriculture.