what makes up carbon dioxide
Carbon dioxide is a tasteless, odorless gas that makes up less than 1 percent of the Earthâs atmosphere. Itâs a natural product of respiration, and plants use it to make food. Too much carbon dioxide is dangerous.arbon is the sixth element in the periodic table and occurs in pure form as coal and diamonds. Oxygen, element eight, is a gas that makes up about 21 percent of the atmosphere. Living things take in oxygen and release carbon dioxide.