The Republican Party is beginning to shed its climate denial policy, two former GOP congressional aides said in a panel discussion at the Capitol.

Pennsylvania Senate Minority Leader Jay Costa wants other lawmakers to sign onto his plan to cap energy sector emissions.

The nine states comprising RGGI have agreed to accelerate reductions in emissions by lowering the annual allowances by 30% over 10 years.

Both houses of the California State Legislature voted late Monday to extend the state’s greenhouse gas (GHG) cap-and-trade program until 2030.

California Democrats unveiled legislation to combat air pollution that included a measure to extend the state’s greenhouse gas cap-and-trade program.

The California Supreme Court declined to review a challenge of the state’s greenhouse gas cap-and-trade program.

RGGI reported another lackluster carbon allowance auction last week, bolstering calls by Mass. and others for more aggressive cuts in the compact’s emission caps.

CAISO launched an initiative to develop a greenhouse gas accounting system suitable for an expanded ISO.

As in New England, electricity prices in Ontario are relatively high, and that has prompted frequent interventions from government.

Cap-and-trade is likely to be a core compliance plan for many states under the Environmental Protection Agency’s final version of the Clean Power Plan.