The Washington Senate approved a bill that would require an increased use of biofuels to cut carbon emissions from vehicles.

The Democrat-controlled Washington Senate barely passed a cap-and-trade bill designed to trim industrial carbon emissions.

A bill to dramatically reduce Washington’s GHG emissions from large refrigeration and air conditioners is near a final vote in the Senate.

A planned $1.5 billion jet biofuel plant in Western Washington has received a potential $600 million to finance initial construction.

Residents of the Tri-Cities area in Washington state oppose a wind project that Scout Clean Energy has proposed building on the Horse Heaven Hills.

Spark Northwest works with community land trusts to address the challenges of bringing rooftop solar to low- and moderate-income households.

A bill to require consideration of climate change in land use planning appears headed toward approval in the Washington state legislature.

A Washington state legislator has introduced a bill to tax electric vehicles 2 cents for every mile driven starting in 2026.

Douglas County PUD has broken ground on a new facility that will produce hydrogen from Columbia River water electrolyzed by energy from its Wells Dam.

A House bill sponsored by a Washington congresswoman seeks to measure cow methane emissions and pinpoint ways to reduce them.