Global carbon is fixed in the biosphere through photosynthesis.

(a) Explain any two ways by which carbon is returned to the atmosphere through natural processes.

(b) List any two human activities that have influenced the carbon cycle in nature. 

 

 

 
 
 
 
 

Answers (1)

a) Respiration by plants and animals and decomposition performed by bacteria and fungi are the two natural processes by which carbon is returned to the atmosphere.

b) Two human activities have influenced the carbon cycle in nature are:

  • burning of fossil fuel
  • burning of forest fuelwood

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