12th Class Biology Sample Paper Biology - Sample Paper-9

  • question_answer
    Describe briefly the human role in carbon cycling.

    Answer:

    Anthropogenic activities, particularly fossil fuel burning and deforestation, are releasing carbon dioxide into the atmosphere. When we mine coal and extract oil from the Earth's crust and then bum these fossil fuels for transportation, heating, cooking, electricity and manufacturing. We are effectively moving carbon more rapidly into the atmosphere than is being added to lithosphere naturally through the sedimentation of carbon, ultimately causing atmospheric carbon dioxide concentration increase.


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