Which of the following is non bio-degradable?
(Mineral wastes, Leather, Wood, Rubber)

Explanation

To determine which of the following options is non-biodegradable, we need to analyze each option provided:

1. **Mineral Wastes**: These are typically inorganic materials that do not decompose naturally. They remain in the environment for a long time and can accumulate, leading to pollution. Therefore, mineral wastes are considered non-biodegradable.

2. **Leather**: Leather is derived from animal hides and can decompose over time, although the process may take a long time due to the tanning process. However, it is still classified as biodegradable because it can eventually break down.

3. **Wood**: Wood is a natural material that can decompose through the action of microorganisms and environmental factors. Hence, wood is also considered biodegradable.

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