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　　三九養(yǎng)生堂記者 鄧肯·蓋伊 報(bào)道

精彩|　　前??(qian)20位??(wei)和??(he)后?(hou)20位??(wei)城??(cheng)市??(shi)名??(ming)單?(dan)　　北??(bei)京??(jing)市??(shi)9月??(yue)優(yōu)??(you)良??(liang)天??(tian)數(shù)??(shu)比??(bi)例??(li)為??(wei)76.7%??，同??(tong)比??(bi)上??(shang)升??(sheng)13.4個(gè)??(ge)百??(bai)分??(fen)點(diǎn)??(dian)??，較??(jiao)2019年??(nian)同??(tong)期??(qi)上??(shang)升??(sheng)26.7個(gè)??(ge)百??(bai)分??(fen)點(diǎn)??(dian)；未?(wei)出??(chu)現(xiàn)??(xian)重??(zhong)度??(du)及?(ji)以??(yi)上??(shang)污??(wu)染??(ran)天??(tian)??，同??(tong)比??(bi)持??(chi)平??(ping)??，較??(jiao)2019年?(nian)同??(tong)期??(qi)持??(chi)平?(ping)；PM2.5濃??(nong)度??(du)為??(wei)29微??(wei)克??(ke)/立??(li)方??(fang)米??(mi)??，同??(tong)比??(bi)下??(xia)降??(jiang)3.3%??，較??(jiao)2019年??(nian)同?(tong)期??(qi)下??(xia)降??(jiang)19.4%；O3濃??(nong)度??(du)為??(wei)175微??(wei)克?(ke)/立??(li)方?(fang)米??(mi)??，同??(tong)比??(bi)下??(xia)降??(jiang)17.5%??，較?(jiao)2019年??(nian)同??(tong)期??(qi)下??(xia)降??(jiang)17.8%??。?1—9月??(yue)??，優(yōu)??(you)良??(liang)天??(tian)數(shù)??(shu)比??(bi)例??(li)為??(wei)70.3%??，同??(tong)比??(bi)下??(xia)降??(jiang)6.6個(gè)??(ge)百??(bai)分??(fen)點(diǎn)??(dian)??，較??(jiao)2019年??(nian)同??(tong)期??(qi)上??(shang)升??(sheng)9.9個(gè)??(ge)百??(bai)分??(fen)點(diǎn)??(dian)；重??(zhong)度??(du)及??(ji)以??(yi)上??(shang)污??(wu)染??(ran)天??(tian)數(shù)??(shu)比??(bi)例??(li)為??(wei)2.9%??，同??(tong)比??(bi)上??(shang)升??(sheng)2.2個(gè)??(ge)百??(bai)分??(fen)點(diǎn)??(dian)??，較??(jiao)2019年??(nian)同??(tong)期??(qi)上??(shang)升??(sheng)1.8個(gè)??(ge)百??(bai)分??(fen)點(diǎn)??(dian)；PM2.5濃??(nong)度??(du)為??(wei)32微??(wei)克??(ke)/立??(li)方??(fang)米??(mi)??，同??(tong)比??(bi)上??(shang)升?(sheng)14.3%??，較??(jiao)2019下??(xia)降?(jiang)23.8%；O3濃??(nong)度??(du)為??(wei)186微??(wei)克??(ke)/立??(li)方??(fang)米?(mi)??，同??(tong)比??(bi)下??(xia)降??(jiang)1.6%??，較??(jiao)2019年??(nian)同??(tong)期??(qi)下??(xia)降??(jiang)9.7%??。

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