Green energy advocates clashed with activists aiming to protect the habitat of an endangered bird species at a hearing on a proposed solar farm in Central Wash.

Washington officials have begun the nuts-and-bolts rulemaking on three major climate change bills the state’s legislature passed in April.

The leaders of Oregon, Washington and British Columbia signed an MOU to push for development of an ultra-high-speed train line designed to reduce GHGs.

States and provinces in the U.S. and other nations are leading efforts to address climate change while their national governments often lag.

Washington will convert its entire state-owned vehicle fleet to electric by 2040, according to an executive order issued by Gov. Jay Inslee.

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.