It was supposed to be a bipartisan moment for the Senate. But now a sweeping energy package promoted as a “down payment” on fighting climate change is falling apart amid a push to limit coolants used in air conditioners and refrigerators. The energy legislation would boost efficiency and authorize billions of dollars to develop a wide range of clean energy options to limit greenhouse gas emissions that contribute to global warming. The measure also would enhance grid security and support efforts to capture and remove carbon emissions from coal and natural gas plants. The bill is widely supported in both parties but stalled this week amid a dispute over a proposed amendment to impose a 15-year phase down of hydrofluorocarbons, or HFCs, that are used as coolants in refrigerators and air conditioners. HFCs are considered a major driver of global warming and are being phased out […]