The organic matter that goes into the soil is converted back into the environment as CO2 thanks to the help of different microorganisms like bacteria, or other organisms like fungus, worms and insects that feed on the organic matter and as residual for that feeding they excrete CO2 and other nutrients for the soil.
An animal that only eats meat is called a carnivore An animal that eats both meat and vegetation is called an omnivore An animal that only eats vegetation is called a herbivore
