World's most polluted cities
POSTED: 09:23 AM PST Jan 14, 2013
UPDATED: 06:22 AM PDT Mar 29, 2013
Take a look at some of the world's most polluted cities, as ranked and compiled by Time, the Blacksmith Institute and ABC Environment.
Vapi, India -- Sitting at the southern end of a belt of industrial estates, Vapi is suffering the side effect of rapid industrial growth. Mercury levels in the city's groundwater are 96 times higher than WHO safety levels, and heavy metals fill the air and can be found in local produce, according to Time.
