Quantitative
- natural pollutants
- pollute the environment
- only when ➡️ quantity > threshold levels
- E.g.:
- CO2 / N2O
- CH4
Qualitative
- anthropogenic pollutants
- if released in small quantities ➡️ pollute the environment
- E.g.:
- CFC
- PFC
- HFC
- Plastic
- SF6
- pesticides