| | | | | | | | | 12 12·5 | | 44 | 42 2 | 2012 12 2014 11 | 12 6 | | | | | | 2015 | | 4-6 | 6 | 12 | | | | | | | 5 | PM 2.5 | | | PM 2.5 | 2 | 7 PM 2.5 | | |