List any three human activities which would lead to an increase in the carbon dioxide content of air.
Q. List any three human activities which would lead to an increase in the carbon dioxide content of air.
Ans. Three human activities which would lead to an increase in the CO2 content of air are :
(i) Respiration : It is the natural process of release of CO2 by both plants and animals. But this release is neither dangerous nor it has adverse effect on our environment. any
(ii) Combustion of fuels: The various types of fuels are burnt to provide energy for various needs like heating, cooking, transportation and industrial fuels.
(iii) Deforestation: Trees help in the conversion of CO2 into organic compounds such as glucose, starch, etc., by the process of photosynthesis. When these trees are cut non-judiciously, then the level of CO2 increases in our environment.
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