Denver has a plan to heat and cool buildings without fossil fuels. It involves … sewage?

Denver has a plan to heat and cool buildings without fossil fuels. It involves … sewage?

Like many cities, Denver's largest source of greenhouse gas emissions is its buildings. Heating and cooling skyscrapers requires a lot of fossil fuels. Now, the city is trying a surprising solution.

Denver Plots Bold Sewer-Heat Makeover For Downtown Core

Denver is gearing up to warm and cool chunks of its downtown with a first-of-its-kind hybrid thermal network that links deep geothermal wells, a closed loop of circulating water and heat skimmed straight from city sewers. City officials say the system could eventually serve office towers, museums and even keep sidewalks clear of ice, all without burning fossil fuels. They expect the plan to move from paper to an on-the-ground pilot within the ne…