Prior to the Industrial Revolution of the late 19th and early 20th centuries, the carbon dioxide level was about 280 ppm.
“We are short of carbon dioxide for the needs of the plants,” Anderson said.
These pollutants have life spans of just a few weeks to a decade—much shorter than that of carbon dioxide.
carbon dioxide n.
A colorless, odorless, incombustible gas formed during respiration, combustion, and organic decomposition and used in inert atmospheres, fire extinguishers, and aerosols.
|carbon dioxide |
A colorless, odorless gas that is present in the atmosphere and is formed when any fuel containing carbon is burned. It is breathed out of an animal's lungs during respiration, is produced by the decay of organic matter, and is used by plants in photosynthesis. Carbon dioxide is also used in refrigeration, fire extinguishers, and carbonated drinks. Chemical formula: CO2.
Note: Carbon dioxide is normally found as a gas that is breathed out by animals and absorbed by green plants. The plants, in turn, return oxygen to the atmosphere. (See carbon cycle and respiration.)
Note: Carbon dioxide is also given off in the burning of fossil fuels (see greenhouse effect).