随着冬季的来临,中国北方地区,特别是华北地区经常出现雾霾天气,严重影响到人的健康。在2015年末,华北地区的雾霾比之以前更甚。12月7日晚,北京启动史上首个空气重污染红色预警。全市除纯电动车外,将实施机动车单双号行驶等预警措施。其中北京市公务用车在单双号行驶的基础上,再停驶车辆总数的30%;公共交通运营部门延长运营时间; With the advent of winter, fog and haze often occur in northern China, especially in northern China, seriously affecting human health. In late 2015, the haze in North China is even worse than before. On the evening of December 7, Beijing launched the first red air pollution warning in history. In addition to pure electric vehicles, the city will implement such measures as single and double numbers of motor vehicles. Among them, Beijing official vehicles on the basis of single and double numbers, and then stop the total number of vehicles 30%; public transport operators to extend operating hours;