How to move from gas to electricity
In recognition of these forces and the city’s own climate action plan, Philadelphia has commissioned a “diversification study” to find a new low-carbon business model for the nation’s oldest gas utility, which delivers natural gas to 510,000 customers. Of the country’s 120 million households, about 58 percent are heated primarily with natural gas. To zero out carbon emissions from those homes, all of their furnaces, water heaters, and other appliances will have to be fueled with “green molecules” (such as biogas, hydrogen, and synthetic gases) instead of fossil gas, or swapped out for heat pumps and other devices powered by renewable electricity. While many cities are adopting or considering rules that require new construction to be all-electric, the much thornier problem is how to get fossil fuels out of existing buildings, which account for about 30 percent of U.S. greenhouse gas emissions.