> What's nice about it, and maybe hard to quantify, is how this limits air pollution in the city. It should be simple to quantify. If gas is used for heating I

> What's nice about it, and maybe hard to quantify, is how this limits air pollution in the city. It should be simple to quantify. If gas is used for heating I can't think there would be any improvement. Local heating with a heatpump would be an improvement if the power supply mix is greener than gas only, maybe worse if the power is all coal.