World's Worst Polluted Cities

10 WORST

Delhi, India

  • Delhi, India, Asia
  • Carbon Monoxide, particulates
  • Pollution comes from industry and vehicular traffic

Linfen, China

  • Linfen, China, Asia
  • Carbon monoxide, particulates
  • Coal burning, vehicular traffic

Cairo, Egypt


  • Cairo, Egypt, Africa
  • Sulfur Dioxide, particulates
  • Vehicle emissions, industries burning low-quality fuel

Accra, Ghana

  • Accra, Ghana, Africa
  • Carbon monoxide, Vehicle emissions, particulates
  • mining, burning garbage

Los Angeles, California

  • Los Angeles, California, North America
  • Nitrogen Oxide, Carbon monoxide
  • industry, vehicular traffic

Houston, Texas

  • Houston, Texas, North America
  • Carbon monoxide, particulates
  • heavy industrial production

La Oroya, Peru

  • La Oroya, Peru, South America
  • Carbon Monoxide, Nitrogen Oxide, particulates
  • Burning Garbage, industrial production

Norilisk, Russia

  • Norilisk, Russia, Europe
  • Carbon Monoxide, particulates
  • Smelting, vehicular traffic

Riachuelo Basin, Argentina

  • Riachuelo Basin, Argentina, South America
  • particulates, nitrogen oxide, carbon monoxide
  • smelting, heavy industrial production

Sukinda, India

  • Sukinda, India, Asia
  • Particulates, carbon monoxide
  • Mining, traffic