While SF has microclimates, the weather goes from barely cold to barely warm. It doesn't really need heating or A/C very much. The thing though is that PG&E's (traditionally) lower costs for natural gas than electricity incentivize(d) the consumption and use of gas water heaters, clothes dryers, and stoves. If the city-county of SF or state wanted to address this as a policy level, they could slap a tax on natural gas. The thing though is they should help people afford the change to electric and on-going higher costs of electricity because people on fixed incomes cannot afford any changes.