What cities have the worst and best air pollution?

1 Answer
BRIAN M.
Jul 3, 2016

The worst air pollution is in Zabel, India.
The best air is found in Calgary, Canada.

Explanation:

The top three cities with the worst air pollution are

  1. Zabol, Iran
  2. Gwalior, India
  3. Allahabad, India

Of the top 15 of the cities with the worst air pollution
seven are in India, four are in China and three are in Saudi Arabia.

The top three cities with the cleanest air are

  1. Calgary, Canada
  2. Honolulu, Hawaii
  3. Helsinki Finland
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