| 摘要 |
PURPOSE: A method for making the quasi ecosystem of an underground space by reflecting sunlight in an underground structure or a tunnel is provided, which permits steady-state photosynthesis of a plant to be achieved in the underground space and provides more hygienic environment thereto. CONSTITUTION: Sunlight is reflected in an underground structure or a tunnel to make a quasi ecosystem such that plants can live therein by photosynthesis. The underground space is also subjected to forced air convection to provide a more hygienic environment. |
