source: By Jacek FH - Own work based on Image:Carbon-dioxide-3D-vdW.png, CC BY-SA 3.0

carbon dioxide

a colorless, odorless gas produced by burning carbon and organic compounds and by respiration. It is naturally present in air (about 0.03 percent) and is absorbed by plants in photosynthesis.

〘化〙 二酸化炭素; 炭酸ガス(｟記号｠ CO2)