What is the carbon dioxide cycle?

Answer by  ivi (6)

Humans breathe out CO2 that is fixed by plants in the process of photosynthesis CO2 + H20 = (CH2O) +O2 , in this reaction CO2 is reduced and H2O is oxidized. The oxygen produced, restores air and consequently it is essential for respiration in humans and in other aerobic organisms.

Answer by  HelpChat (494)

Humans breathe out CO2. It is released into the atmosphere. Then it is absorbed, among other things, plants. Plants use C02 in the process of photosynthesis, which turns light into food. One of the byproducts of photosynthesis is oxygen, which humans breathe and process to make energy. The byproduct of that is CO2, which is breathed out again.

Answer by  jenjen90 (240)

The carbon dioxide cycle starts as you just said, humans breathe out CO2. Then, flowers, trees, and all the other plants in the world sort of breathes it in. Then, somehow they change that air into clean oxygon and when you breathe in your breating clean air. Perfect for your blood!

Answer by  monalily (218)

When we breathe we exhale carbon dioxide gas. This gas is inhaled by plants during the process of photosynthesis which use carbon dioxide, water and sunlight to produce food and plants in turn leaves oxygen gas which are fundamental for human.