The document discusses greening homes and a sanctuary by calculating carbon footprints, gathering data on energy usage and sources, and developing plans to reduce carbon emissions. It provides details on calculating carbon footprints for the Hancock Church using a carbon calculator and lists the amounts of different energy sources used and resulting carbon dioxide emissions. It also outlines steps to green the sanctuary, such as measuring building characteristics, determining highest emitting spaces, and evaluating options to insulate, change lighting, and incorporate solar energy to reduce the carbon footprint over 10 years.