against
air
asian
china
chinese
concept
danger
dangerous
east asia
environment
environmental issue
face
frowning
gas mask
hazard
hazardous
hong kong
isolated on white background
japan
japanese
korea
korean
life
looking at camera
male
man
people
person
pm 25
pollution
portrait
problem
protecting
protection
protective wear
singapore
singaporean
smog
staring
studio shot
taiwan
taiwanese
voc
volatile organic compounds
wearing
young adult