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Oxford study proves heat pumps triumph over fossil fuels in the cold
(www.nationalobserver.com)
This is a most excellent place for technology news and articles.
You're right to be concerned about emissions, if you live in a place where a significant portion electricity comes from coal its almost certainly cleaner to just burn the natural gas. Which area of the world is this if you don't mind saying?
I'm in Alberta (Canada)
Haha yeah that would do it. Even here in Ontario we still have a lot of houses with gas hookups despite our clean and (relatively) cheap electricity, but I see more ads for heat pump installs now so it's definitely changing.