Trying to solve the problem of supplying food to astronauts who are about to land on the Moon, Mars and other planets in the near future, NASA and Arizona University experts proposed using the Lunar / Mars Greenhouse inflatable greenhouse. A development that simulates the climatic and other conditions of our planet is suitable for growing various crops in extraterrestrial space. The cylindrical model will work according to a closed principle, pumping water through the root system of plants and collecting condensate. However, in order for it to work, water will still have to be delivered from Earth or to find sources of life-giving moisture already in place – scientists, as you know, have long been puzzled by this problem. All carbon dioxide exhaled by space mission participants will be collected and sent to the greenhouse. Here the plants process it into oxygen, which will be returned to people. Thus, Lunar / Mars Greenhouse will solve several problems at once, fully participating in the existence of a small ecosystem. It will be possible to protect plants from excessive radiation by placing the greenhouses underground. With regard to photosynthesis, colonists can use for the variant of plant illumination. In the first case, this is LED lights, in the second – sunlight-reflecting panels with fiber optic cable. Both options have already passed in conditions simulating the space environment and have proven their effectiveness. The size of the Lunar / Mars Greenhouse prototypes is 2.44 × 5.49 meters.