it's been a while meaning, it's been a while definition | English Cobuild dictionary. been. 1 Been is the past participle of be. 2 verb If you have been to a place, you have gone to it or visited it. He's already been to Tunisia, and is to go on to Morocco and Mauritania...
Carbon dioxide is a by-product of respiration ] and combustion combustion: Combustion is the process of burning by fire. . Green plants remove carbon dioxide from the atmosphere by photosynthesis. Living organisms-including all plants and animals-release energy from their food using respiration.Respiration and combustion-burning-both release carbon dioxide into the atmosphere.These processes form a carbon cycle in which the proportion of carbon dioxide in the atmosphere remains about the same.The animation should help you to understand how the cycle works.espiration and combustion-burning-both release carbon dioxide into the atmosphere. These processes form a carbon cycle in which the proportion of carbon dioxide in the atmosphere remains about the same.
Carbon dioxide (CO2) is produced during respiration by all animals, fungi and microorganisms that depend either directly or indirectly on plants for food. It is thus a major component of the carbon cycle. When you breathe in oxygen (O) from the air around you, it travels through your body and is converted to carbon dioxide (CO2).