… The GC3 recommendations would have to take into account Connecticut’s changing energy profile. Between 1996 and 2015, natural gas largely replaced the dirtier fossil fuels coal … The GC3 recommendations would have to take into account Connecticut’s changing energy profile. Between 1996 and 2015, natural gas largely replaced the dirtier fossil fuels coal … The GC3 recommendations would have to take into account Connecticut’s changing energy profile. Between 1996 and 2015, natural gas largely replaced the dirtier fossil fuels coal …