8th Class Science Sample Paper Science Sample Paper-3

  • question_answer 36) How is \[C{{O}_{2}}\] added to the atmosphere in excess?

    Answer:

    \[C{{O}_{2}}\] is continuously being released because of human activities and on the other hand, forest area is decreasing. Plants utilize \[C{{O}_{2}}\] from the atmosphere for photosynthesis, thereby decreasing the excess of \[C{{O}_{2}}\] in the air. Deforestation leads to an increase in the amount of \[C{{O}_{2}}\] in the air, because the number of trees which consume \[C{{O}_{2}}\] becomes lesser. Human activity thus contributes to the accumulation of \[C{{O}_{2}}\] in the atmosphere.


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