Environmental advocates have weighed in at a public hearing on the Christie administration's proposal to formally repeal rules aimed at reducing pollution from power plants.

Friday's hearing occurred more than two years after Gov. Chris Christie withdrew New Jersey from the Regional Greenhouse Gas Initiative. The "cap-and-trade" measure is aimed at reducing carbon dioxide pollution by setting limits on emissions by power plants that burn fossil fuels.

A New Jersey appeals court ruled in March the state had failed to follow provisions required to repeal the regulations, including a requirement to hold public hearings.

The Department of Environmental Protection has said a formal repeal will not affect the state's participation in the program. But advocates urged officials to reconsider.

Senate President Steve Sweeney has introduced legislation challenging the repeal.