What is the three ways of making carbon dioxide?

It's for my homework, and I really need a serious answer.


ThanksWhat is the three ways of making carbon dioxide?
1) Exhaling. You exhale carbon dioxide as part of the breathing process.


2) Burning carbon based fossil fuels. A car produces carbon dioxide gas as one of its byproducts.


3) Large amounts of carbon dioxide are producd from volcanoes and other geothermal processes such as hot springs, etc