A Philadelphia Gas Works green energy pilot project that would have replaced a small amount of the fossil fuel it sends out to homes with renewable natural gas was rejected by state regulators on Thursday because the program couldn’t justify the higher cost of the biogas. Under PGW’s proposal, the city-owned utility would have spent as much as $500,000 a year to buy renewable natural gas (RNG) made from landfill or farm waste. The RNG would have amounted to less than 1% of the fuel that PGW sends out to customers…David W. Sweet, the PUC’s vice chairman, dissented, saying PGW program’s costs were an “infinitesimal amount” — about 0.4% of the nearly $123 million the utility spends a year on energy purchases. More >>