Carbon dioxide is a colorless, odorless, non-toxic, and slightly acid-tasting gas. Sometimes referred to as a carbonic acid gas, the molecule consists of one atom of carbon joined to two atoms of oxygen. It occurs naturally in the atmospheres of many planets, including that of earth. Carbon dioxide is uniformly distributed over the earth's surface at a concentration of about 0.033%, or 330 parts per million. It was called "fixed air" by the Scottish chemist and physician …showed first 75 words of 1431 total…

…showed last 75 words of 1431 total…trapping more of the energy radiated from earth and are likely to lead to global warming and weather extremes. Carbon dioxide has many roles on our planet today, from keeping the surface of earth warm to cleaning clothes. It exists naturally as a gas, but displays odd behaviors as a solid. It is around us at all times, and used in many products that we see daily. Carbon dioxide is essential for life on earth.