Pollution is not something you think about when traveling. Flight tickets, luggage, and activities are what you usually focus on.
PM2.5 levels: 89.7 µg/m3 (598% over WHO safe standard)
PM2.5 levels: 80.1 µg/m3 (534% over WHO safe standard)
PM2.5 levels: 70.9 µg/m3 (473% over WHO safe standard)
PM2.5 levels: 66.6 µg/m3 (444% over WHO safe standard)
PM2.5 levels: 65.8 µg/m3 (439% over WHO safe standard)