Curtain Walls. Curtain wall systems clad a building envelope with glass and aluminum to protect the interior from the elements and creates a safe and comfortable work environment for the building occupants. Curtain walls are designed to only carry their own weight.
A. PHOTOSYNTHESIS Photosynthesis n: A process by which green plants and other organisms produce simple carbohydrates from carbon dioxide and hydrogen, using energy that chlorophyll or other organic cellular pigments absorb from radiant sources.
The substances needed for photosynthesis are water, carbon dioxide and chlorophyll. Plants require these three substances in the presence of light to convert light energy into chemical... Star Gazing