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There's a little-known air pollution rule that more and more cities are using to keep their air quality within federal limits when wildfire smoke threatens to send them over pollution limits.

Virginia's climate law requires 100% renewable energy by 2050. The commonwealth is also known as the data center capital of the world. Can those ambitions coexist?

Traditional farmers around the world are walking away from millions of acres of land where they once grew crops or grazed animals. It's provoking mixed reactions.

The war in Iran has roiled energy markets. Oil has spiked, natural gas is soaring in Europe and Asia, and gasoline prices have seen their highest one-week jump in years.

Global Witness, an international human rights group, says a record 227 grassroots environmental activists were killed in 2020. More than half were killed in Colombia, Mexico and the Philippines.

On Earth Day, Colorado climate activist Alan Bruce lit himself on fire outside the U.S. Supreme Court. He died of his injuries the next day. His friends and family say his intentions remain unclear.

The tree in Duesseldorf has gotten more than 5,000 letters and cards. People send it greetings, pour out their hearts, and ask for advice. The project encourages protection of old trees.

Leaders of the Export-Import Bank of the United States voted Thursday to help fund the expansion of an oil refinery in Indonesia.

NPR's Michel Martin speaks with energy lobbyist and media strategist Frank Maisano about former Senate staffer and oil lobbyist Andrew Wheeler, who was just named acting EPA administrator.

Appliance makers and home builders are in Washington, D.C., to celebrate the energy efficiency program. Energy Star is among 50 EPA programs that would be eliminated under the president's budget plan.