Is CO2 a villainous substance?
Actually no. We are a carbon based life form. Plants take up CO2 and combine with water (H2O) in a process called Photosynthesis, that uses the energy of sunlight to produce sugars and fats (C6 H12 O6). In the process, Oxygen (O2) is released as a byproduct. Human’s derive energy from these substances, basically by adding back oxygen, in a process known as Krebs cycle, where the sugars are broken down into their constituent parts and CO2 and H2O are released as byproducts. This is the cycle of life. Plants and animals are in a symbiosis with one another.