Seattle has opened the doors to what could be the country's first net-zero sports and entertainment complex: the Climate Pledge Arena.

An 80-MW solar farm proposed for central Washington is moving closer to state approval.

A conference hosted by Washington's Office of the Insurance Commissioner discussed how the insurance sector is becoming entangled in climate change risks.

Global warming has led to decreased crop yields and increased disease in some wildlife in Washington, state lawmakers heard.

States are “moving the needle” on climate change but must continue challenging the federal government and each other, members of the U.S. Climate Alliance say.

Washington State Ferries expects to convert from solely diesel fuel engines in its vessels to hybrid fuel-battery propulsion.

The Washington Fish and Wildlife Commission designated ferruginous hawks as endangered; climate change and wind turbines are two factors in the decision.

Dozens of solar developers want to build in Eastern Washington, but the majority are unfamiliar with the sensitive habitat that is prime turf for solar farms.

Feedback split along predictable lines on Washington’s efforts to adopt California’s strict standards on zero-emission medium- and heavy-duty trucks.

Washington officials are moving to respond to the state's extreme drought after admitting they were taken by surprise by how quickly it developed.