Question

Which of the given below options is a non-renewable source of energy?

• A. Wood
• B. Sun
• C. Fossil fuel
• D. Wind

Answer 1

The correct option is C

Fossil fuel

Explanation of the correct option

In the case of option C,

1. Based on sustainability, energy is classified into two types- renewable sources of energy and non-renewable sources of energy.
2. Renewable resources are energy sources that cannot be depleted and are able to supply a continuous source of clean energy.
3. Non renewable resources exist in nature freely and once they are used can not be created again easily.
4. With increasing energy demand these resources are depleting over time. So it is necessary to use them consciously for sustainable development.
5. Thus, fossil fuels such as coal, and petroleum, are examples of non-renewable energy resources.

Explanation for incorrect options

In the case of option A,

1. Wood is the future of energy and can be renewed easily.
2. Within our lifetimes, trees can be replanted and grown back easily.
3. Thus, it is a renewable source of energy.

In the case of option B,

1. The energy from the sun is available freely and infinitely. As the sun is the largest source of energy.
2. Concentrated solar towers, heliostats, solar panels, etc are used for generating electricity using solar energy.
3. Thus, the sun is a renewable source of energy.

In the case of option D,

1. Similarly, the wind is a renewable source of energy as nature is constantly supplying wind.
2. The kinetic energy of the wind is used for rotating the wind turbines to produce electricity.

Hence, option C is the correct answer.