Which one of the following is a way to conserve energy?

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Increased use of renewable energy sources

Using public transport

Switching off electricity when not in use.

All of the above

answer is D.

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Detailed Solution

All the above-stated statements can be understood as ways to conserve energy. Energy is the basic requirement for economic development and the driving force of all human activities and development. Every sector of the national economy, be it primary, secondary or tertiary, requires energy input. There are various ways to conserve energy on a personal level-
1)      Making use of renewable sources of energy whenever possible.
2)      Using public transport instead of individually owned vehicles
3)      Switching off lights when not in use to save electricity.

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