How much of a dent it will make remains to be seen, but Denmark does have an active plan to shift away from fossil fuels for heating. Installation of new oil and natural-gas furnaces was recently banned, partly as part of the push away from fossil fuels, and partly because of fears of Russian dominance over gas supplies. In urban areas the goal is to get everyone on the district-heating grid, which is fueled mostly by a mix of trash incinerators and cogeneration with electric power plants. There's a medium-term plan to opportunistically produce more of the heat from excess wind power, with hopes that doing so will produce a "win-win" for electric-grid management by giving grid managers an easy place to dump energy to smooth out short-term variations in electric production.

Transport is another story. Lots of fossil fuels there, and probably not going away soon.