Question

Explain How Air Cycle Occur​

Answer 1

Answer:

Plants and animals use oxygen to respire and return it to the air and water as carbon dioxide (CO2). ... CO2 is then taken up by algae and terrestrial green plants and converted into carbohydrates during the process of photosynthesis, oxygen being a by-product.

Answer 2

Answer:

Air cycle refrigeration works on the reverse Brayton or Joule cycle. Air is compressed and then heat removed, this air is then expanded to a lower temperature than before it was compressed. Work must be taken out of the air during the expansion, otherwise the entropy would increase.