Carbon dioxide is a colorless, non-organic compound that is a gas at room temperature and comprises about 0.03 percent of Earth's atmosphere. It is produced when materials that contain carbon are combusted, and it is one... More » Science Environmental Science

Carbon dioxide has applications as a refrigerant and coolant in many different industries. It acts as a chemical precursor in the industrial production of urea and methanol and is a common shielding gas for inert gas wel... More »

Scottish physician and chemist Joseph Black discovered carbon dioxide on June 11, 1754. He noticed that heating calcium carbonate produced a gas much heavier than air. He also noted that it could put out fire. He called ... More »

The carbon dioxide and oxygen cycles work through processes that convert carbon in the atmosphere into oxygen and transform oxygen back into carbon dioxide. Plants are the main producers of oxygen through a process calle... More »

Animals help maintain the Earth's natural environments by predating upon plants and other animals, pollinating various plants, and exhaling carbon dioxide, which green plants require to live. Additionally, animals help t... More »

Carbon constitutes the sixth-most-abundant element in the universe, accounts for 20 percent of the weight of almost all living organisms, and makes up roughly 0.04 percent of the Earth's atmosphere in the form of carbon ... More » Science Chemistry

The mesosphere, which is the third innermost layer of the Earth's atmosphere, is comprised largely of nitrogen, oxygen and carbon dioxide. Its chemical composition differs very little from that of the innermost layers of... More »