Match the following waste disposal methods with their primary environmental impact.
| Waste Disposal Method | Environmental Impact |
|---|---|
| A. Landfilling | 1. Air pollution |
| B. Incineration | 2. Groundwater pollution |
| C. Open dumping | 3. Soil contamination |
| D. Recycling | 4. Conservation of resources |
1
A-2, B-1, C-3, D-4
2
A-3, B-2, C-1, D-4
3
A-1, B-3, C-4, D-2
4
A-4, B-2, C-3, D-1