Describe the role of Cyanobacteria in charging Earth's early atmosphere

Cyanobacteria were very simple organisms and performed were an role in changing Earth's early atmosphere. They carried out photosynthesis to produce the materials they needed to grow. In this process, they relesed Oxygen which is needed to sustain life on Earth for Humans and other organisms

Explanation:

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answer; the above statement is (true);

yes it is   dangerous

explanation:

because that foot is discusting and could get you sick