Why is nuclear waste hazardous?

Explanation

### Step-by-Step Solution:

1. **Understanding Nuclear Waste**:
- Nuclear waste is the byproduct of nuclear reactions, primarily from nuclear power plants that utilize radioactive materials such as uranium or plutonium for energy generation.

2. **Radioactive Materials**:
- These materials are inherently unstable and emit radiation as they decay. This radiation can take various forms, including alpha particles, beta particles, and gamma rays.

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