• # question_answer 36) How is $C{{O}_{2}}$ added to the atmosphere in excess?

$C{{O}_{2}}$ 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.