Pollution Science

  1. Sources and Classification of Pollutants
    1. Classification by Origin
      1. Natural Sources
        1. Volcanic Activity
          1. Forest Fires
            1. Dust Storms
              1. Biological Processes
                1. Weathering and Erosion
                2. Anthropogenic Sources
                  1. Industrial Sources
                    1. Manufacturing Processes
                      1. Power Generation
                        1. Chemical Production
                          1. Mining and Smelting
                          2. Agricultural Sources
                            1. Fertilizer Application
                              1. Pesticide Use
                                1. Animal Husbandry
                                  1. Irrigation Practices
                                  2. Municipal Sources
                                    1. Sewage and Wastewater
                                      1. Solid Waste Disposal
                                        1. Urban Runoff
                                        2. Transportation Sources
                                          1. Road Transportation
                                            1. Aviation
                                              1. Shipping
                                                1. Rail Transport
                                                2. Residential Sources
                                                  1. Heating and Cooling
                                                    1. Consumer Products
                                                      1. Household Chemicals
                                                  2. Classification by Chemical Nature
                                                    1. Organic Pollutants
                                                      1. Hydrocarbons
                                                        1. Aliphatic Hydrocarbons
                                                          1. Aromatic Hydrocarbons
                                                            1. Polycyclic Aromatic Hydrocarbons
                                                            2. Pesticides
                                                              1. Organochlorines
                                                                1. Organophosphates
                                                                  1. Carbamates
                                                                  2. Polychlorinated Biphenyls
                                                                    1. Dioxins and Furans
                                                                      1. Pharmaceuticals
                                                                      2. Inorganic Pollutants
                                                                        1. Heavy Metals
                                                                          1. Lead
                                                                            1. Mercury
                                                                              1. Cadmium
                                                                                1. Arsenic
                                                                                  1. Chromium
                                                                                  2. Acids and Bases
                                                                                    1. Nutrients
                                                                                      1. Nitrogen Compounds
                                                                                        1. Phosphorus Compounds
                                                                                        2. Salts and Minerals
                                                                                        3. Radioactive Pollutants
                                                                                          1. Natural Radionuclides
                                                                                            1. Artificial Radionuclides
                                                                                              1. Sources of Radioactivity
                                                                                            2. Classification by Physical State
                                                                                              1. Gaseous Pollutants
                                                                                                1. Volatile Organic Compounds
                                                                                                  1. Greenhouse Gases
                                                                                                    1. Criteria Air Pollutants
                                                                                                    2. Liquid Pollutants
                                                                                                      1. Oil and Petroleum Products
                                                                                                        1. Industrial Effluents
                                                                                                          1. Leachates
                                                                                                          2. Solid Pollutants
                                                                                                            1. Particulate Matter
                                                                                                              1. Dust and Aerosols
                                                                                                                1. Microplastics
                                                                                                                  1. Sediments
                                                                                                                2. Classification by Environmental Behavior
                                                                                                                  1. Persistent Pollutants
                                                                                                                    1. Biodegradable Pollutants
                                                                                                                      1. Mobile Pollutants
                                                                                                                        1. Immobile Pollutants