Heat pump based electric heat in out mild climate emits less CO2, even factoring in transmission and conversion losses, than burning the gas in the most efficient condensing gas heater. It still costs about 3x as much in terms of energy cost, but emits less CO2.
However, the city regulators, like I said above, are stupid, so you often can't get a permit for a heat pump, because of noise ordinances. These things sound like an A/C compressor, so you can only install it if there is enough distance to your neighbors, and that's usually not possible in newer, denser developments, precisely the kinds where natural gas is banned, so you are now forced to use resitive heating, which uses 3-4x as much power as a heat pump, and costs more than 3x as much, due to our tiered electric prices (additional units cost more than early units)
However, the city regulators, like I said above, are stupid, so you often can't get a permit for a heat pump, because of noise ordinances. These things sound like an A/C compressor, so you can only install it if there is enough distance to your neighbors, and that's usually not possible in newer, denser developments, precisely the kinds where natural gas is banned, so you are now forced to use resitive heating, which uses 3-4x as much power as a heat pump, and costs more than 3x as much, due to our tiered electric prices (additional units cost more than early units)