In the midst of winter, the streets of Vancouver will be carpeted with a light layer of snow, punctuated by steaming openings where it has already melted. The access holes to the drains below ground are caused by the heat flowing through the city's sewers, warming up the pavements. "There's enough heat in the sewerage system to literally heat up neighbourhoods," remarks Derek Pope, manager of neighbourhood energy for the city of Vancouver, Canada. "That's what we've been doing here in False Creek since 2010."