CBC
Many buildings buy and burn gas or other fossil fuels to keep warm. But there’s actually a free, carbon-free source of heat underfoot that they could be tapping into instead — sewage pipes. Along with wastewater, those pipes carry a lot of “waste” heat from buildings, including warm water from showers and dishwashers. For example, as I was writing this, it was around 0 C outside the CBC building Toronto, but the water in the nearby sewage pipes was roughly 17 C, according to the city. In most places, that heat is literally going down the drain. But it doesn’t have to be that way. Click here to continue reading