Land Fills, Constructing dams, Deep well injection, Incineration.

Explanation

**Step-by-Step Solution:**

1. **Identify the Terms**: The four terms given are Landfills, Constructing Dams, Deep Well Injection, and Incineration.

2. **Understand Each Term**:
- **Landfills**: These are designated sites for the disposal of waste materials where garbage is stored.
- **Constructing Dams**: This involves building structures that hold back water, often for purposes like hydroelectric power generation or water supply.
- **Deep Well Injection**: This is a process where liquid waste is injected underground into wells for disposal.
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