Answer:
Cyanobacteria were photosynthetic and slowly changed the earth's atmosphere from CO2 rich to O2 rich. Photosynthetic cyanobacteria evolved by 3.5 billion years ago and greatly modified earth's atmosphere.
Answer:
its the deterioration of the environment through depletion of resources such as air, water and soil or in a more simple form: the destruction of ecosystems
Explanation:
Answer:
Omalycus Raf and Hypoblema Lloyd
Explanation: