The Mini-Biosphere is a transportable greenhouse designed for public space. It demonstrates principles of circularity by collecting rainwater for irrigation, harvesting solar power to circulate the water, and using composting for nutrients and heating. It is the size of a parking space and does not require foundations or connection to infrastructure. This feature allows quick installation on-site for long or short periods on any paved surface such as pedestrian streets, courtyards, parking lots, brownfields, and sites waiting for development. It is a new, decentralized off-grid food production facility that promotes responsible consumption and nutritional awareness.