Washington state has relaunched rulemaking that will pave the way for linking the state’s cap-and-trade program with the already-linked programs of California and Quebec.

Washington voters showed overwhelming support for the state’s fledging cap-and-invest system when they firmly rejected a ballot measure that sought to repeal the program.

Washington could be closer to joining the California-Québec carbon market after the three governments issued a statement saying they will explore linking their cap-and-trade systems.

Washington’s first quarterly carbon allowance auction of 2024 has thrown two new wrinkles into the economics of the state’s fledgling — and controversial — cap-and-invest program.

Washington is poised to start phasing in electric school buses after lawmakers approved a bill directing the Department of Ecology to help school districts convert their existing diesel fleets.

A former Washington DOT economist is suing the state over allegations he was forced out of his job because his superiors did not like his forecasts showing that gas prices would jump under cap-and-invest.

The specter of a November referendum on Washington’s cap-and-invest program hovered over the state Senate when it passed a bill to link the program with the California-Quebec system.