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Atmospheric gases biological sources

Gas Principal biological source Residence time in the atmosphere... [Pg.52]

Nitrous oxide (N2O) is an important atmospheric gas that is emitted predominantly by biological sources in soils and water. Although by comparison to CO2 and H2O, N2O has a far lower concentration, it is an extremely influential greenhouse gas. This is a result of its long... [Pg.67]

Unsaturated aliphatic and cyclic hydrocarbons have numerous biological sources. Ethylene, H2C = CH2, the simplest of the series, is emitted by green plants in substantial quantities. It has hormonal activity and has been implicated in the control of many physiological processes in plants. The natural tropospheric concentration of ethylene is very low due to its high reactivity with ozone, -OH, and other atmospheric oxidants (Robinson and Robbins, 1968), but in polluted atmospheres its concentrations can be much higher. It is a product of combustion of wood, coal, oil, natural gas, and petroleum. Elevated levels of ethylene, such as may occur in homes where coal gas is used for cooking, can be very deleterious to plants. [Pg.29]

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See also in sourсe #XX -- [ Pg.52 ]



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