The climate crisis urgently requires many solutions. Energy from wastewater systems significantly reduce buildings’ GHG emissions, thereby positively contributing to municipal climate action plans and reducing overall environmental impact. The average carbon reduction is typically between 20% and 25%, representing the portion of the total heating and cooling energy usage. In a city such as Boston, for example, these efforts can positively influence public health outcomes and counteract the multiple threats that vulnerable communities face due to climate pollutants, specifically carbon emissions. Energy from wastewater systems have no adverse effects: no air or noise pollution, and no needed land acquisition. The benefits from energy from wastewater systems extend to our most marginalized populations—those most likely to be impacted by increasing air pollution, energy insecurity, sea level rise, water quality, and extreme temperatures.