The 'Green Lung' of Ho Chi Minh City
Can Gio mangrove forest is known as the 'green lung' of Vietnam's Ho Chi Minh City.
Thousands of trees help to protect against the pollution which is pumped into the surrounding atmosphere on a daily basis.
The forest also helps to reduce the devastating effects of the growing number of floods and typhoons.
Hoang Nguyen, from the BBC's Vietnamese Service, visited the area to find out more.