The developer of a large and controversial wind and solar farm in southeastern Washington contends the state’s siting body has ordered unscientific changes that make the project unviable.

House Republicans lambasted a deal that the Biden administration struck between Oregon, Washington and four tribes on four dams along the Snake River.

A Washington lawmaker has introduced a bill to authorize a study to gauge the ecological impacts of offshore wind projects along the state’s coastline.

The bill to create a new agency to monitor activity in Washington's petroleum market details five pages of the kind of information the body would have to collect from oil companies.

A Seattle-based conservative think tank says the Washington governor knew nearly a decade ago that a cap-and-invest program in the state would increase gas prices.

Washington expects to collect $941 million in extra cap-and-invest program money in the first half of 2024, bringing overall income to roughly $3 billion in the first 18 months.

A recently retired state economist has filed a claim against Washington, alleging he was ordered not to include cap-and-trade costs in a revenue forecast, leading to him to leave his position with the agency