Chlorella is a genus of about thirteen species of single-celled green algae of the division Chlorophyta. The cells are spherical in shape, about 2 to 10 μm in diameter, and are without flagella. Their chloroplasts contain the green photosynthetic pigments chlorophyll-a and -b. In ideal conditions cells of Chlorella multiply rapidly, requiring only carbon dioxide, water, sunlight, and a small amount of minerals to reproduce.
Chlorella has been considered as a source of food and energy because its photosynthetic efficiency can reach 8%,[2] which exceeds that of other highly efficient crops such as sugar cane.
Chlorella has been considered as a source of food and energy because its photosynthetic efficiency can reach 8%,[2] which exceeds that of other highly efficient crops such as sugar cane.