Chicago River transformed after nearly a century of pollution VnExpress Around 300 people jumped into the frigid waters of the Chicago River, once one of the world's most polluted waterways for almost 100 years.
Foreigners fleeing Hanoi's air pollution VnExpress Despite loving Hanoi and having lived there for 8 years, William Gray moved his family away because he could no longer endure the air "thick with vehicle exhaust and the smell of burning plastic".
