90% of total photosynthesis in the world is carried out by

90% of total photosynthesis in the world is carried out by Algae.
90% of total photosynthesis is carried out by aquatic plants, chiefly algae. 10% of total photosynthesis is performed by land plants.
Photosynthesis is the process by which higher plants, algae, and certain species of bacteria transform and store solar energy in the form of energy-rich organic molecules.
It is the process by which organisms use sunlight to produce sugars for energy. Plants, algae and cyanobacteria all conduct oxygenic photosynthesis.