Compare LPG and wood as fuels.

Explanation

**Step-by-Step Solution:**

1. **Definition of Fuels:**
- Fuels are substances that release energy when burned. They are used for various purposes such as heating, cooking, and generating power.

2. **Traditional Fuel - Wood:**
- Wood has been used as a traditional fuel for both domestic and industrial purposes. It is derived from trees and is one of the oldest sources of energy.

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