Olympic athletes are bracing themselves for the smog in Beijing, but the capital of China isn't the only place where air pollution is an issue.
Photographers from around the world have documented, in pictures, the face masks worn by people to deal with poor air quality. All of the photos in this gallery are from Flickr users and range from Santiago, Chile to Bangkok, Thailand and even include shots from Canadians guarding their lungs in Toronto.
Photo credits go to:
Long distance cyclist
Troy & Katie