Co2

Carbon dioxide, Co2, is one of the gases in our atmosphere, being uniformly distributed over the earth's surface at a concentration of about 0.033% or 330 ppm. Commercially, finds uses as a refrigerant (dry ice is solid Co2), in beverage carbonation, and in fire extinguishers. 10.89 billion pounds of carbon dioxide were produced by the chemical industry. 22nd on the list of top chemicals produced. Because the concentration of carbon dioxide in the atmosphere is low, it is not practical to obtain the gas by extracting it from air. Most commercial carbon dioxide is recovered as a by product of other processes, such as the production of ethanol by fermentation and the manufacture of ammonia. Some Co2 is obtained from the combustion of coke or other carbon containing fuels.