December was the warmest on record in Oregon, Washington and California, while Idaho had its second-warmest December, according to the National Centers for Environmental Information. The warm month ...

A major legal showdown over the future of gasoline cars is now underway, and the stakes stretch far beyond California’s borders. The U.S. Department of Transportation has filed a lawsuit against the ...

California’s lawmakers over the weekend extended the state’s carbon market for years – and rebranded it to mirror Washington’s landmark climate policy. The two West Coast states are pulling to the ...

Washington state currently holds the highest gas prices in the nation, with the average cost for a gallon of regular gasoline at $4.66, officially dethroning California from its long-held position as ...