How Air Pollution Is Measured

• Broken down into categories

• • NOx — nitrogen oxides
  • • Irritants, precursors of ozone
  • CO — carbon monoxide
  • • Poisonous in large doses
  • VOC — Volatile Organic Compounds
  • • Includes a multitude of chemicals
    • Many are harmful, including carcinogens
    • May be dangerous at very low levels
    • • E.g. Benzene is dangerous at 1 part per million for 8 hours
    • Accurate monitoring requires expensive equipment