15 Cities with the Cleanest Air in the World

Page 10 of 16

7. Ottawa, Ontario, Canada

PM 2.5 annual mean, ug/m3: 7.0

The Government of Canada is very dedicated to improving air quality, and they even have Clean Air Day. Environmentally-friendly activities are promoted all over the country in order to raise awareness of the importance of clean air and healthy living.

15 Cities with the Cleanest Air in the World

Adwo/Shutterstock.com

Page 10 of 16