Heating

Researchers in China have reportedly created an insulation material that can "retain and release heat according to specific temperature requirements."

Sidewalks in Holland have for years utilized piped-in waste heat to melt snow. Now, they've added an additional sidewalk amenity: a hearth.

Heat emitting from riders of the Paris Metro and from the subway trains will heat 17 apartments in a new system debuting in France.

White roofs have gained cachet as a solution to the urban heat island effect. But in places where there are more cold days than hot, a white roof that reflects warming sunlight might not make the best sense, according to this piece.