Police officers control a vehicle in Paris, Monday, March 17, 2014. Cars with even-numbered license plates are prohibited from driving in Paris and its suburbs Monday, following a government decision over the weekend. Paris is taking drastic measures to combat its worst air pollution in years, banning around half of the city's cars and trucks from its streets in an attempt to reduce the toxic smog that's shrouded the City of Light for more than a week. Visible in background is the Arc de Triomphe.(AP Photo/Remy de la Mauviniere)
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