Carbon Dioxide

Carbon dioxide is one of the oxides of carbon, containing one carbon and two oxygens. It is a gas at room temperature. It has the formula CO2. The carbon is in the middle and double-bonded to each oxygen. Carbon dioxide is in the atmosphere at approximately 412 parts per million.

It is an essential component of photosynthesis, and thus vital for plants (6 CO2 + 6 Water -> Glucose + 6 O2)

It is the output of cellular respiration (The same formula in reverse.)

CO2 is denser than air and is one of the results of burning hydrocarbons.