I've just finished a pair of pieces for How We Get To Next about Gothenburg's innovative district heating and cooling systems.
The Swedish city of Gothenburg doesn’t just have an electrical grid, it has one for heat too. Deep below its streets, some 620 miles of pipes carry warm water from refineries and incinerators into apartment buildings across the city. The result is cheap, relatively green heating in a part of the world where winter temperatures can drop below freezing for several months of the year.
It was an interesting one to put together, especially as it so directly intersects with my life. I see the refinery whenever I go down to the river, but rarely think about how it's heating my apartment.