Answer: Option (D) is the correct answer.
Explanation:
When there is minimum use of energy and we are still able to preserve resources then it means we are cutting the demand for energy.
Therefore, when we are treating water with chlorine then it means without any electricity or energy we are cleaning the water. But at the same time chlorinated water is harmful to use unless chlorine is dissolved in limiting quantity.
Whereas energy efficient appliances will use the electricity efficiently.
Landfill will require the use of machines or man power therefore, energy will be used.
On the other hand, when rules are framed against the use of chlorofluorocarbons then there will be lesser depletion of ozone layer. Hence, use of energy will be minimum.
Thus, we can conclude that legislation against the use of chlorofluorocarbons has helped preserve resources while cutting the demand for energy.
