### (i) Classification of Waste (Excluding Source or Origin)
Waste can be classified by multiple schemes, including the following:
1. **Physical State**:
- Solid Waste: Includes items like plastics, metals, and organic materials.
- Liquid Waste: Includes wastewater, oil, and chemicals.
- Gaseous Waste: Includes emissions from industrial processes and gases released into the atmosphere.
2. **Hazardous Nature**:
- Non-Hazardous