7th Class Social Science Sample Paper Social Science Sample Paper - 2

  • question_answer
    How does nature balance our life? What is the result if this balance is disturbed?  

    Answer:

          Green plants use carbon dioxide to make their food and release oxygen. Humans or animals release carbon dioxide. The amount of carbon dioxide released by humans or animals seems to be equal to the amount used by the plants which make a perfect balance. But this balance is disturbed by burning of fuels, which add billions of tons of carbon dioxide in the atmosphere. As a result, the increased volume of carbon dioxide is affecting the earth?s weather and climate.


You need to login to perform this action.
You will be redirected in 3 sec spinner