The design is part of EXPO2015 Future Food District, a project showcasing possible new directions for food sustainability, and how people play a role in the food chain. The expo is part of a long tradition of World Fairs, where entrepreneurs, engineers, and scientists come together to showcase prototypes of future technologies. According to the ecoLogicStudio’s website, its entry of the Urban Algae Canopy will produce as much oxygen as four hectares (about 2.5 acres) of woodland. The expo will run from May 1 to Oct. 31.

Algae are critically important to maintaining the Earth’s atmosphere and breathable air. The microscopic organisms produce between 70 and 80 percent of the Earth’s oxygen. Some enterprising environmentalists are also using algae to scrub excess carbon dioxide from the air, which the algae convert into food during photosynthesis.

Hopefully the Urban Algae Canopy will be more than just a prototype, and we’ll start seeing things like it around buildings in major cities everywhere soon.

Screengrab via EndgameArchitecture/imgur