In his veto message, Wolf said the regulation “is a vital step for Pennsylvania to reduce carbon emissions and achieve our climate goals.”

Pennsylvania moved closer this year to joining a regional program to cut emissions from power plants, despite repeated attempts to stop it from Republicans who control the legislature.

Gov. Tom Wolf is likely to veto the measure, but that won’t mean the regulation could immediately take effect.

The Wolf administration says the regulation to join the Regional Greenhouse Gas Initiative should be published now; the Republican-led legislature says it has ‘many months’ to review the rule.

Shapiro said it’s not clear RGGI will address climate change while protecting energy jobs and ensuring affordable power.

The measure in the state Senate would give the legislature more say on who serves on the Air Quality Technical Advisory Committee.

Get to know the cap-and-trade program that’s created controversy in Pennsylvania.

The action comes the same day the Democratic Attorney General, who is running for governor, tried to distance himself from the program.

Attorney General Josh Shapiro, who is running to succeed fellow Democrat Tom Wolf as governor, says any climate action Pa. takes should ‘protect and create energy jobs.’

The team at Penn State found that the commonwealth could reduce health impacts caused by power plant pollution by between $18 and 40 billion dollars over the next nine years.