What is the importance of cyanobacteria for our atmosphere? what did they produce and how? what happened to the first materials they produced?

Importance of cyanobacteria for our atmosphere is , it provide oxygen during the process of photosynthesis .

Explanation:

Cyanobacteria is important as ,

It performs the process of photosynthesis , and releases oxygen in the atmosphere , it uses sunlight for the process of photosynthesis .

Cynobacteria have converted an early oxygen - deficient , reducing atmosphere to an oxidizing atmosphere  , causing to the Great Oxygenation Event and Rusting of The Earth , that changed the composition of the Earth's life form and led to near - extinction of the anaerobic organisms .

polar areas, such as antarctica or the south pole.