Commonwealth Court said the Department of Environmental Protection did not have the constitutional authority to collect revenue from the program.

Gov. Tom Wolf ordered the review, but it will be up to new Gov. Josh Shapiro’s administration to take any action.

Pennsylvania finished regulations to join a carbon-trading program and to limit oil and gas site emissions in 2022.

Attorneys for industry groups and Republican state lawmakers say RGGI is an unconstitutional tax on power plants by the executive branch.

Democratic Gov. Tom Wolf and top state lawmakers are hurriedly negotiating a massive economic development package that would encourage natural gas development in Pennsylvania.

Coal and labor groups and power plant owners are suing the Department of Environmental Protection, saying the rule will cause them irreparable harm.

Some environmental advocates say the program is outdated.

Environmental justice areas include low-income neighborhoods and communities of color that shoulder more than a typical share of climate and environmental risks that can affect people’s health.

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.