These cities have heated sidewalks and seem pretty happy about it

The largest cities in two of the world’s three happiest countries, as ranked in the latest World Happiness Report published by the United Nations, have heated sidewalks. 
In Reykjavik, Iceland, thermal energy harvested from hot springs is used for snow melting. Hot water is pumped through tubes under many of the sidewalks. It’s like in-floor heating, but outside. Meanwhile in Oslo, Norway, uses electric heating elements embedded in sidewalks to melt snow.
Montreal’s experi