Understanding Non-Renewable Energy Sources

Energy sources are broadly classified into two main types: renewable and non-renewable. Renewable energy sources are those that can be replenished naturally over a short period or are practically inexhaustible. Non-renewable energy sources, on the other hand, exist in finite quantities and are consumed much faster than they are formed, meaning they will eventually run out.

Analysing Energy Options

Let's examine each option provided to determine which one is a non-renewable source of energy:

• Solar Energy: This energy comes from the sun's radiation. The sun is expected to shine for billions of years, making solar energy a virtually inexhaustible and renewable resource.
• Bio-mass Energy: Bio-mass refers to organic matter from plants and animals. Materials like wood, crops, and waste can be burned or converted into biofuels. As long as plants can regrow and waste is produced, bio-mass is considered a renewable energy source.
• Wind Energy: Wind is generated due to uneven heating of the Earth's surface by the sun, atmospheric pressure differences, and Earth's rotation. Wind is a constantly available natural phenomenon, making wind energy a renewable resource.
• Coal: Coal is a fossil fuel formed from dead plant matter over millions of years under heat and pressure. It is extracted from the ground and burned to produce energy. Because it takes millions of years to form and the reserves are limited, coal is a classic example of a non-renewable energy source.

Identifying the Non-Renewable Source

Based on the definitions and analysis:

• Solar is renewable.
• Bio-mass is renewable.
• Wind is renewable.
• Coal is non-renewable.

Therefore, coal is the non-renewable source of energy among the given options.