State lawmakers unanimously approved a bill that directs Washington State University to study the feasibility of recycling wind turbine blades.

Gov. Jay Inslee announced that he has approved a plan by Cypress Creek Renewables to construct two large solar farms in Yakima County.

Washington LCFS credits will likely range from $35 to $45 per metric ton by 2025, lower than prices in neighboring areas, according to one carbon analysis firm.

Backers of a proposal intended to draw federal funding to create a hydrogen hub in the Pacific Northwest say their application is ready to be submitted.

Two state senators introduced a bill to provide farmers and haulers of agricultural products relief from costs arising from the state's cap-and-trade program.

Washington’s Department of Ecology confirmed that it raised almost $300 million from the state’s first quarterly cap-and-trade auction held in February.

Washington carbon allowance prices will increase sharply as the state’s cap-and-trade program becomes better established, carbon market analysts said.

Washington’s first cap-and-trade auction earned the state nearly $300 million in revenue and unloaded all allowances on offer.

A coalition of builders and other parties filed suit to revoke new state rules that ban the installation of gas-fired space and water heaters in new buildings.

The Washington House voted to require wind turbine lights be turned off at night when not triggered by airplanes.