Question

Need of the hour is to use energy judiciously. Why?

Answer 1

This is because in today's world the energy sources are depleting fast and if we continue to use energy in the same way, nothing would be left for the future generations to survive.

Answer 2

The human civilization cannot depend on the fossil fuels for much longer. Sources that have a threat of getting depleted some day are said to be exhaustible sources of energy. Using some sources of energy is one major step that we can adopt to save energy. This is because Renewable energy is available in our natural environment which is practically negligible.