Photosynthesis

प्रकाश संश्लेषण 

(Photosynthesis)

Photosynthesis is a process used by plants and other organisms to

convert light energy into chemical energy that can later be released to fuel the organisms' activities. This chemical energy is stored in carbohydrate

molecules, such as sugars, which are synthesized from carbon dioxide and

water – hence the name photosynthesis, from the Greek phōs "light", and

sunthesis "putting together".

In most cases, oxygen is also released as a waste product. Most plants, most

algae, and cyanobacteria perform photosynthesis; such organisms are called photoautotrophs. Photosynthesis is largely responsible for producing 

and maintaining the oxygen content of the Earth's atmosphere, and supplies most of the energy necessary for life on Earth.