Question

12. (a) What are the two ways by which CO, is returned back into atmosphere?
(b) Describe how the nitrogen molecules are converted into nitrates and nitrites by
(1) Biological process
(i) Physical process​

Answer 1

Cellular Respiration, burning coal, wood, gasoline, turn the Carbon-based molecules back into Carbon Dioxide and water. These Oxidation reactions return the Carbon Dioxide to the atmosphere.☺☺