According to a recent report by The Guardian, the Oglala have built at least eight of these underground greenhouses in the last decade. They’re modeled after a Bolivian underground greenhouse developed thirty years ago to help bring food security to rural communities.
The reservations tap into geothermal energy to maintain a stable temperature year-round, about 52 degrees Fahrenheit. Some also pull heat from deeper in the Earth through tubing systems. Others also absorb heat from the surface, pulling in solar energy from the sun.
The need for food sovereignty comes as the Oglala have some of the highest poverty rates in the country. More than half of the residents of Oglala Lakota county live below the poverty line.
The reservation is classified as a food desert, which the USDA defines as a tract in which “at least 100 households are located more than one-half mile from the nearest supermarket and have no vehicle access; or at least 500 people, or 33 percent of the population, live more than 20 miles from the nearest supermarket, regardless of vehicle availability.”
Lack of access to fresh, healthy food can worsen diet-related health issues, including type-2 diabetes, heart disease, and certain types of cancer.
“Our Reservation is not in a position to handle another severe weather storm,” Julian Bear Runner, then president of the Oglala Sioux Tribe, told the U.S. House natural resources committee in 2019 after a major flood.
Underground greenhouses can be constructed rather inexpensively. One community member, Bryan Deans, president of Oglala Lakota Cultural & Economic Revitalization Initiative, built one from $3,500 raised via crowdfunding.
Deans’ greenhouse, which was 1,200 square feet in size, was constructed using dirt-filled tires for walls along with other upcycled materials. The build took less than three weeks.
An average underground greenhouse can grow 65,000 starter plants — enough to feed as many as 400 people during a ten-day annual event that teaches people about underground greenhouses and other climate-ready living techniques.
“This is a third-world country in the middle of the United States,” Deans told The Guardian. “You can either look at it as if it’s hopeless, you can’t do anything … Or you can look at it as well, nothing’s been done here, so anything can be done here.”