9.3 Common atmospheric pollutants and their sources

• What is a major source of atmospheric pollutants?


  Combustion of fuels
• What elements do most fuels contain?


  Carbon and/or hydrogen
• What gases are released when a fuel burns?


  Carbon dioxide, water, carbon monoxide
• What forms particulates in the atmosphere during combustion?


  Solid particles and unburned hydrocarbons
• What happens during incomplete combustion?


  Some fuel does not burn due to low oxygen
• What is released during incomplete combustion?


  Soot, carbon monoxide, unburnt fuel
• What do hydrocarbons release during combustion?


  Energy, carbon dioxide, and water
• What is carbon monoxide?


  A toxic, colourless, and odourless gas
• What health issues are caused by sulfur dioxide and nitrogen oxides?


  Acid rain and respiratory problems
• What effects do particulates have on the environment?


  Cause global dimming and health problems
• What are the main pollutants released from fuel combustion and their effects?


  • Carbon dioxide: greenhouse gas
  • Water vapour: contributes to humidity
  • Carbon monoxide: toxic gas
  • Nitrogen oxides: cause acid rain
  • Sulfur dioxide: causes respiratory issues
  • Particulates: lead to global dimming