AdvertisementHow Your Hot Showers And Toilet Flushes Can Help the ClimateMay 21, 2021Sam BraschfacebookEmailTreated Denver wastewater flows into the South Platte River in April. In what may be the largest U.S. project of its kind, Denver will use excess energy from sewage wastewater to heat and cool a new agriculture, arts and education center. (CPR News)