I just had to buy a new gas furnace and air conditioner, so, with my mind on global warming, I asked the furnace guy what it would cost to put in a heat pump. He said he has put in quite a few, but the costs have gone way up. He also said that in our climate I would need an electric back-up furnace for winter because a heat pump loses efficiency quickly at temps below -15C. The cost was going to be around $30,000, compared to $15,000 for the new gas furnace and AC. Also, electricity in Ontario is an incredibly expensive way to heat, so that would be a big extra monthly cost in the winter. An in-ground geothermal system would be about $65,000, he said.

It isn't hard to see why gas is still popular, and that it will continue to be far into the future unless we undertake some kind of national project to replace our fossil fuel infrastructure with nuclear for the needed electricity and then convert our cars and homes over to full electric.