Washington officials have begun the nuts-and-bolts rulemaking on three major climate change bills the state’s legislature passed in April.

California entered an agreement with the governments of Quebec and New Zealand to work together on carbon markets and other climate action.

The Pennsylvania EQB approved final rules to join 10 other New England and Mid-Atlantic states in RGGI despite GOP efforts to put the issue on hold.

A Washington Supreme Court hearing provided a practice run for possible upcoming court battles over Gov. Inslee’s partial vetoes of recently passed climate bills.

Legislative leaders slammed Washington Gov. Jay Inslee’s veto of segments of cap-and-trade and low-carbon fuels standard bills.

Washington’s climate change bills will not go into effect until the legislature passes a transportation budget. No one is quite sure when that will be.

Washington is on its way to becoming the second state to have a comprehensive cap-and-trade program after a Senate vote approving the bill.

Two bills would move North Carolina toward reaching net zero by 2050, a third would repeal the state's Renewable Energy Portfolio Standard.

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

Fellow Democrats are questioning California Gov. Gavin Newsom’s budget proposal to spend $1.5 billion to accelerate the adoption of zero-emissions vehicles.