<h1><img alt="雾霾天" src="http://ichef.bbci.co.uk/news/ws/660/amz/worldservice/live/assets/images/2015/12/18/151218092324_hebei_smog_976x549_reuters.jpg" width="976" height="549" style="font-family: inherit; font-size: 14px; font-style: inherit; font-weight: inherit; letter-spacing: inherit; line-height: inherit; color: #bdbdbd; margin: 0px; padding: 0px; vertical-align: baseline; height: auto; max-width: 100%; -webkit-user-select: none; width: 645.781px; display: block; background-color: #111111;" /></h1><div property="articleBody" style="border: 0px; color: #404040; font-family: Helvetica, Arial, STHeiti, 华文黑体, \’Microsoft YaHei\’, 微软雅黑, SimSun, 宋体, \’WenQuanYi Micro Hei\’, sans-serif; font-size: 14px; line-height: 14.5455px; margin: 0px 53.7642px 0px auto; padding: 0px; vertical-align: baseline; background-color: #ffffff;"><figure style="border: 0px; color: inherit; font-style: inherit; font-family: inherit; font-weight: inherit; letter-spacing: inherit; line-height: inherit; margin: 32px -54.2188px 0px 0px; padding: 0px; vertical-align: baseline; clear: both; background-color: #111111;"><span style="border: 0px; color: inherit; font-style: inherit; font-family: inherit; font-size: 14px; font-weight: inherit; letter-spacing: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline; display: block; position: relative;"><span style="border: 0px !important; color: inherit; font-style: inherit; font-family: inherit; font-size: 14px; font-weight: inherit; letter-spacing: inherit; line-height: inherit; margin: 0px; padding: 0px !important; vertical-align: baseline; clip: rect(1px 1px 1px 1px); overflow: hidden; position: absolute !important; height: 1px !important; width: 1px !important;">Image copyright</span><span style="border: 0px; color: #ececec; font-style: inherit; font-family: inherit; font-size: 0.5625rem; font-weight: inherit; letter-spacing: 0.25px; line-height: 1; margin: 0px; padding: 3px 8px 1px; vertical-align: baseline; bottom: 0px; position: absolute; right: 0px; background: rgba(0, 0, 0, 0.6);">Reuters</span></span><figcaption style="border: 0px; color: inherit; font-style: inherit; font-family: inherit; font-weight: inherit; letter-spacing: inherit; line-height: inherit; margin: 0px; padding: 16px; vertical-align: baseline; visibility: visible;"><span style="border: 0px !important; color: inherit; font-style: inherit; font-family: inherit; font-size: 14px; font-weight: inherit; letter-spacing: inherit; line-height: inherit; margin: 0px; padding: 0px !important; vertical-align: baseline; clip: rect(1px 1px 1px 1px); overflow: hidden; position: absolute !important; height: 1px !important; width: 1px !important;">Image caption</span><span style="border: 0px; color: #ececec; font-style: inherit; font-family: inherit; font-size: 0.75rem; font-weight: inherit; letter-spacing: inherit; line-height: 1.33333; margin: 0px; padding: 0px; vertical-align: baseline; display: block;">本轮雾霾波及了中国华北70多个城市，周一，中国华东地区的上海也是雾霾天。</span></figcaption></figure><p style="border: 0px; font-style: inherit; font-family: inherit; font-size: 1rem; font-weight: bold; letter-spacing: inherit; line-height: 1.5; margin-top: 28px; padding: 0px; vertical-align: baseline;">中共新华社援引中国环保部卫星遥感监测结果显示， 19日，京津冀及周边地区灰霾面积为56万平方公里，20日扩大至66万平方公里，重霾面积由36万平方公里扩大至47万平方公里。</p><p style="border: 0px; font-style: inherit; font-family: inherit; font-size: 1rem; font-weight: inherit; letter-spacing: inherit; line-height: 1.5; margin-top: 18px; padding: 0px; vertical-align: baseline;">中国媒体计算称，北京市总面积约1.64万平方公里，本轮雾霾的面积约有40个北京大。</p><p style="border: 0px; font-style: inherit; font-family: inherit; font-size: 1rem; font-weight: inherit; letter-spacing: inherit; line-height: 1.5; margin-top: 18px; padding: 0px; vertical-align: baseline;">中国环保部消息，京津冀及周边地区70个地级及以上城市中，河南濮阳、河北衡水、山东潍坊三个城市空气质量为严重污染，山东聊城和济宁、河南开封、山东德州等22个城市为重度污染。</p><p style="border: 0px; font-style: inherit; font-family: inherit; font-size: 1rem; font-weight: inherit; letter-spacing: inherit; line-height: 1.5; margin-top: 18px; padding: 0px; vertical-align: baseline;">截至周一（21号）下午1点，位于北京东朝阳区的美国大使馆公布的北京空气质量指数（AQI）为244。</p><p style="border: 0px; font-style: inherit; font-family: inherit; font-size: 1rem; font-weight: inherit; letter-spacing: inherit; line-height: 1.5; margin-top: 18px; padding: 0px; vertical-align: baseline;">北京市环保局周一的监测数据显示，北京部分地区空气中致命的PM2.5微粒每立米含量高达495微克，这是世界卫生组织确认安全水准的20多倍。</p><p style="border: 0px; font-style: inherit; font-family: inherit; font-size: 1rem; font-weight: inherit; letter-spacing: inherit; line-height: 1.5; margin-top: 18px; padding: 0px; vertical-align: baseline;">世界卫生组织对空气中PM2.5污染物的含量所提出的安全标准是每立方米不超过25微克。</p><p style="border: 0px; font-style: inherit; font-family: inherit; font-size: 1rem; font-weight: inherit; letter-spacing: inherit; line-height: 1.5; margin-top: 18px; padding: 0px; vertical-align: baseline;">同一时间，中国华东地区的上海AQI为233，为重度污染。</p><p style="border: 0px; font-style: inherit; font-family: inherit; font-size: 1rem; font-weight: inherit; letter-spacing: inherit; line-height: 1.5; margin-top: 18px; padding: 0px; vertical-align: baseline;">北京、河北的邯郸和廊坊3个城市在本轮雾霾中启动了红色预警。河北天津、河南濮阳等14个城市为橙色预警，山东淄博、河南开封、辽宁沈阳等12个城市为黄色预警，山东秦皇岛等4个城市为蓝色预警。</p><figure style="border: 0px; color: inherit; font-style: inherit; font-family: inherit; font-weight: inherit; letter-spacing: inherit; line-height: inherit; margin: 24px -24.6449px 0px 0px; padding: 0px; vertical-align: baseline; clear: both;"><span style="border: 0px; color: inherit; font-style: inherit; font-family: inherit; font-size: 14px; font-weight: inherit; letter-spacing: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline; display: block; position: relative;"><img src="http://ichef.bbci.co.uk/news/ws/624/amz/worldservice/live/assets/images/2015/12/19/151219030125_china_smog_map_dec_18_2015_624x624__nocredit.jpg" datasrc="http://ichef.bbci.co.uk/news/ws/320/amz/worldservice/live/assets/images/2015/12/19/151219030125_china_smog_map_dec_18_2015_624x624__nocredit.jpg" width="624" height="624" style="color: inherit; font-style: inherit; font-family: inherit; font-weight: inherit; letter-spacing: inherit; line-height: inherit; margin: 0px; padding: 0px; vertical-align: baseline; height: auto; max-width: 100%; -webkit-user-select: none; width: 616.207px; transition: opacity 0.5s ease-in; display: block;" alt="" /><span style="border: 0px !important; color: inherit; font-style: inherit; font-family: inherit; font-size: 14px; font-weight: inherit; letter-spacing: inherit; line-height: inherit; margin: 0px; padding: 0px !important; vertical-align: baseline; clip: rect(1px 1px 1px 1px); overflow: hidden; position: absolute !important; height: 1px !important; width: 1px !important;">Image copyright</span></span></figure><h2>第二个红色预警</h2><p style="border: 0px; font-stretch: inherit; font-family: Helvetica, Arial, STHeiti, 华文黑体, \’Microsoft YaHei\’, 微软雅黑, SimSun, 宋体, \’WenQuanYi Micro Hei\’, sans-serif; font-size: 1rem; line-height: 1.5; margin-top: 18px; padding: 0px; vertical-align: baseline;">北京于19日发布了入冬以来的第二个红色雾霾预警，并将持续到22号结束。中国当局要求汽车限行、工厂停工、中小学和幼儿园停课，市民被建议留在室内。</p><p style="border: 0px; font-style: inherit; font-family: inherit; font-size: 1rem; font-weight: inherit; letter-spacing: inherit; line-height: 1.5; margin-top: 18px; padding: 0px; vertical-align: baseline;"><span style="font-family: Helvetica, Arial, STHeiti, 华文黑体, \’Microsoft YaHei\’, 微软雅黑, SimSun, 宋体, \’WenQuanYi Micro Hei\’, sans-serif; font-size: 1rem; line-height: 1.5;">北京市环保局周日（20号）晚的空气质量通报称，20日夜间，北京市处于重度污染水平。21号整体空气质量仍将处于重度污染水平。22日将从重度污染转为严重污染。23日逐步转好。</span></p><div> </div><div><p style="border: 0px; font-family: Helvetica, Arial, STHeiti, 华文黑体, \’Microsoft YaHei\’, 微软雅黑, SimSun, 宋体, \’WenQuanYi Micro Hei\’, sans-serif; font-size: 1rem; line-height: 1.5; margin-top: 18px; padding: 0px; vertical-align: baseline;">北京市环保局称，20号全北京市的城管执法系统共检查施工工地931个、渣土车162辆（次），查处露天焚烧29起、露天烧烤24起、无照经营燃煤3起。</p><p style="border: 0px; font-family: Helvetica, Arial, STHeiti, 华文黑体, \’Microsoft YaHei\’, 微软雅黑, SimSun, 宋体, \’WenQuanYi Micro Hei\’, sans-serif; font-size: 1rem; line-height: 1.5; margin-top: 18px; padding: 0px; vertical-align: baseline;">专家指出，造成北京雾霾的最直接原因是北京和周边地区大量的火力电厂所排放的烟雾、以及工业污染和汽车尾气排放；另外，三面环山的平原地理特点也不利于雾霾散去。</p><p style="border: 0px; font-family: Helvetica, Arial, STHeiti, 华文黑体, \’Microsoft YaHei\’, 微软雅黑, SimSun, 宋体, \’WenQuanYi Micro Hei\’, sans-serif; font-size: 1rem; line-height: 1.5; margin-top: 18px; padding: 0px; vertical-align: baseline;">有研究显示，中国每年因空气污染死亡的人数高达140万，平均每天约4000人。</p> </div><div> </div></div><div> </div><div> </div>