(　　新)(京)(报)(快)(讯)((记)(者)(王)(硕)()据)(环)(保)(部)(21日)(晚)(间)(公)(布)(的)(信)(息)(，2017年)(1月)(，京)(津)(冀)(区)(域)(13个)(城)(市)(PM2.5浓)(度)(128微)(克)(/立)(方)(米)(，同)(比)(上)(升)(43.8%，北)(京)(PM2.5浓)(度)(116微)(克)(/立)(方)(米)(，同)(比)(上)(升)(70.6%。为)(何)(京)(津)(冀)(及)(周)(边)(区)(域)(1月)(份)(的)(空)(气)(质)(量)(出)(现)(如)(此)(大)(幅)(度)(的)(下)(滑)(?
　　对)(此)(，环)(保)(部)(副)(部)(长)(赵)(英)(民)(解)(释)(，主)(要)(有)(四)(个)(方)(面)(原)(因)(。一)(是)(京)(津)(冀)(区)(域)(工)(业)(产)(品)(产)(量)(在)(增)(加)(，空)(气)(改)(善)(压)(力)(大)(。他)(说)(，从)(去)(年)(下)(半)(年)(开)(始)(，京)(津)(冀)(区)(域)(的)(钢)(铁)(、电)(解)(铝)(等)(产)(品)(的)(产)(量)(出)(现)(上)(涨)(，部)(分)(企)(业)(春)(节)(期)(间)(加)(班)(加)(点)(生)(产)(。通)(过)(国)(家)(电)(网)(用)(电)(量)(分)(析)(，很)(多)(企)(业)(春)(节)(期)(间)(用)(电)(量)(没)(有)(下)(降)(。此)(外)(，环)(保)(部)(高)(架)(源)(在)(线)(监)(控)(显)(示)(，今)(年)(以)(来)(，京)(津)(冀)(区)(域)(污)(染)(传)(输)(通)(道)(上)(“2+26”城)(市)(重)(点)(工)(业)(源)(氮)(氧)(化)(物)(比)(去)(年)(上)(升)(50%以)(上)(，二)(氧)(化)(硫)(排)(放)(总)(量)(也)(有)(升)(高)(。这)(些)(数)(据)(从)(不)(同)(角)(度)(印)(证)(，京)(津)(冀)(区)(域)(工)(业)(排)(放)(在)(增)(加)(。
　　第)(二)(个)(方)(面)(的)(原)(因)(，京)(津)(冀)(农)(村)(散)(煤)(有)(上)(升)(趋)(势)(，散)(煤)(替)(代)(需)(要)(加)(速)(。赵)(英)(民)(表)(示)(，环)(保)(部)(最)(近)(会)(同)(发)(改)(委)(等)(部)(门)(入)(户)(调)(查)(发)(现)(，随)(着)(农)(村)(生)(活)(水)(平)(提)(高)(，农)(村)(燃)(煤)(使)(用)(量)(发)(生)(变)(化)(。过)(去)(以)(小)(煤)(炉)(为)(主)(，只)(在)(卧)(室)(取)(暖)(，现)(在)(多)(数)(改)(成)(土)(锅)(炉)(，取)(暖)(面)(积)(扩)(大)(，用)(煤)(量)(过)(去)(每)(户)(不)(足)(1吨)(，现)(在)(基)(本)(都)(在)(2吨)(以)(上)(，成)(倍)(上)(升)(。此)(外)(，抽)(查)(发)(现)(，居)(民)(散)(烧)(的)(燃)(煤)(中)(，约)(1/4的)(燃)(煤)(质)(量)(较)(差)(。
　　第)(三)(个)(原)(因)(，今)(年)(春)(节)(在)(1月)(，有)(些)(城)(市)(受)(烟)(花)(爆)(竹)(影)(响)(PM2.5快)(速)(上)(升)(。监)(测)(显)(示)(，除)(夕)(夜)(18点)(，全)(国)(只)(有)(19个)(城)(市)(重)(度)(及)(以)(上)(污)(染)(，但)(是)(到)(了)(初)(一)(凌)(晨)(2点)(，重)(度)(以)(上)(污)(染)(城)(市)(增)(至)(183个)(。
　　此)(外)(，今)(年)(1月)(，气)(象)(条)(件)(仍)(然)(维)(持)(2016年)(秋)(冬)(以)(来)(的)(不)(利)(情)(况)(，气)(候)(异)(常)(。赵)(英)(民)(表)(示)(，2016年)(秋)(冬)(以)(来)(，北)(半)(球)(的)(国)(家)(，包)(括)(部)(分)(初)(步)(解)(决)(了)(空)(气)(污)(染)(问)(题)(的)(发)(达)(国)(家)(也)(遭)(遇)(了)(重)(污)(染)(。我)(国)(北)(方)(冷)(空)(气)(不)(活)(跃)(，强)(度)(弱)(，风)(速)(小)(，温)(度)(偏)(高)(。而)(今)(年)(1月)(，京)(津)(冀)(区)(域)(小)(风)(频)(率)(同)(比)(又)(上)(升)(12.8%，高)(湿)(频)(率)(上)(升)(了)(18.5%，平)(均)(温)(度)(上)(升)(了)(3.1℃，京)(津)(冀)(区)(域)(先)(后)(出)(现)(了)(5次)(污)(染)(过)(程)(，进)(一)(步)(拉)(高)(了)(1月)(的)(污)(染)(物)(浓)(度)(。
　　链)(接)(：
　　1月)(74城)(市)(空)(气)(质)(量)(相)(对)(较)(差)(排)(名)(后)(10位)(城)(市)(：石)(家)(庄)(、邢)(台)(、邯)(郸)(、保)(定)(、乌)(鲁)(木)(齐)(、西)(安)(、太)(原)(、衡)(水)(、郑)(州)(和)(唐)(山)(市)(
　　空)(气)(质)(量)(相)(对)(较)(好)(的)(前)(10位)(城)(市)(：海)(口)(、舟)(山)(、拉)(萨)(、昆)(明)(、丽)(水)(、福)(州)(、台)(州)(、厦)(门)(、深)(圳)(和)(惠)(州)(市)(
)