SO2 (Sulphur dioxide) Oxides of Nitrogen (NO, NO2) CFC (Chlorofluorocarbons) Particulate/ aerosol (Dust, dirt, soot, smoke, liquid droplets) (CO2) (Carbon dioxide) Combustion of fossil-fuel Lightning Activity Inside Combustion engine of cars Chemical plant Construction Forest Fires Refrigerant Aerosol Spray Deforestation Combustion of fossil-fuel Volcanic eruption Acid rain Destroy aquatic life Damage building and statue Acid rain Destroy aquatic life Damage building and statue Respiratory disease Lung Cancer Ozone depletion Global warming Climate change