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Because the state Legislature already addressed issues raised by the federal government, the court ruling has no practical impact in Washington.

Two greenhouse domes on the Colville Reservation will house the state’s first 'agrivoltaics' project, where food and electricity can grow in tandem on small acreage.

The state hopes to secure up to $2 billion in federal funding to produce hydrogen fuel as a substitute for petroleum-based gasoline.

Tom Carpenter, who has kept tabs on one of the Earth's most contaminated spots, is retiring. But he's not leaving his watchdog work behind.

An internal federal document says the preparation for turning nuclear waste into glass logs will produce toxic vapors.

Legislation to reduce greenhouse gas emissions would require methane collection systems at certain landfills.

Scientists look for ways to restore these important components of the ocean ecosystem.

Projects addressing alternative power issues sometimes pit environmentalists vs. environmentalists.

Lawmakers could look at more than a dozen climate proposals addressing carbon reduction and other environmental issues.

An effort to generate energy along the Columbia through a concept called 'pumped storage' has drawn pushback from tribes and environmental groups.