Air in Phnom Penh - Phnom Penh Post

Surgery Mask - Phnom Penh Post

Air Visual (Air Pollution Monitoring)

Air pollution is killing 6.5 million people each year - Global Citizen

The Coal Hard Truth About Air Pollution - Greenpeace

15 Tips for Travelers Who Want to Stay Healthy - NPR

Respirator mask reduces effects of pollution on the heart - Medical Xpress

As Air Worsens, New Delhi Turns to Masks. The Flashier the Better. - New York Times

In the Dirtiest Cities, Air Pollution Forces Life Changes - New York Times