An Indigenous reservation has a novel way to grow food – below the earth’s surface | Native Americans | The Guardian

Those underground on the reservation use geothermal energy to keep a stable year-round temperature of about 52F, and some use a series of tubes that capture and circulate heat from deeper underground. At the same time, the greenhouses absorb and bank heat from the sun. Source: An Indigenous reservation has a novel way to grow food – below the earth’s surface | Native Americans | The Guardian