20 Most Polluted Cities in the World
| January 2, 2017
Los Angeles-Long Beach, U.S.A
Think this stuff only happens in developing countries? Sadly, you’d be wrong. The Los Angeles-Long Beach area has the worst ozone pollution in the United States.
Thankfully, it’s on the road to recovery. This year, the number of smog days decreased by 34% thanks to a push towards the use of public transport and the increasing popularity of zero emissions vehicles.
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