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Air pollutants can also be categorized by their area of impact:
- Ozone depletion substances affect the stratosphere (these include CFCs, halons, HCFCs).
- Greenhouse gases occur in the troposphere (these include CO2, CH4, N2O, CFCs and other hydrocarbons, O3).
- Toxins affect humans and other living creatures (these include dioxins, furans).
- 瀏覽次數：856
