HARRISBURG (AP) – The centerpiece of Gov. Tom Wolf’s plan to fight climate change has passed its last regulatory hurdle in a fight pitting Democrats, nuclear power plant owners, and the renewable energy sector against Republicans, fossil fuel-plant owners, blue-collar labor unions, and heavy industry. The plan to impose a price on carbon dioxide emissions from fossil fuel-fired power plants in PA won approval by a 3-2 vote from the Independent Regulatory Review Commission. The jury is out on whether it would significantly reduce greenhouse gas emissions. A key feature is that it would generate hundreds of millions of dollars for clean energy and energy efficiency programs. Opponents say the plan will cost many jobs and raise energy bills.