Why are carbon dioxide concentrations expected to increase? a. carbon dioxide concentrations are expected to increase, because fossil fuel burning is expected to increase. b. carbon dioxide concentrations are expected to increase, because of an increase in agriculture. c. carbon dioxide concentrations are expected to increase, because more land will have to be cleared for increasing populations and agricultural use. d. all of the above select the best answer from the choices provided

D. All of above

Explanation:

Carbon dioxide is a greenhouse gas and has been increased in the air. There is a continuous increase in carbon dioxide level of air due to more burning of fossil fuel by increasing population and by increasing agricultural activities to meet the demand for food. The fertilizer production units are one of the major agricultural activity leading to the emission of carbon dioxide into the air. Deforestation to use the forest land for residential and agricultural activities also increase the CO2 level of air since plants use CO2 for photosynthesis.

D.) All of the above

Explanation:

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