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  3. The northern Italian city of Milan banned all traffic from its streets for 10 hours on Sunday in an attempt to reduce smog.

The northern Italian city of Milan banned all traffic from its streets for 10 hours on Sunday in an attempt to reduce smog.

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问题     The northern Italian city of Milan banned all traffic from its streets for 10 hours on Sunday in an attempt to reduce smog.
    The measure which was first【B1】______on a trial basis in the year 2007 is triggered whenever pollution exceeds the statutory limit for 12 consecutive days.
    Satellite【B2】______shows Milan to be one of the most polluted cities in Europe. An【B3】______120,000 vehicles will be affected by the move, according to the major daily newspaper in the city.
    The most polluting vehicles have been banned from driving through the city center since Thursday. But on Sunday, there【B4】______be no traffic between 8:00 and 18:00.
    The ban is imposed when pollution exceeds 50【B5】______of particulates per cubic meter of air over 12 days. The last time the full ban was in force was in February.
    The move is not popular with all【B6】______, who argue that the city’s public transport system should be improved to【B7】______their cars. Local Green Party councilor Enrico Fedrighini said cars with three or four people inside should be offered【B8】______for example. "One or two car-free Sundays each month will not do anything to【B9】______the smog crisis," he told the daily newspaper in the city.
    Public transport was to be bolstered during the day, with an extra metro trains and buses【B10】______.
【B5】
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