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The Eiffel Tower was barely visible amidst a thin blanket of smog that descended on Paris and other parts of northern France on Wednesday. 本周三巴黎和法国北部部分地区被浓厚的雾霾笼罩，埃菲尔铁塔只能依稀可见。 The dangerous spike in air pollution prompted authorities to take emergency measures such as lowering speed limits and banning trash fires as the French air quality monitoring agency Airparif raised its air pollution alert to its second-highest level. Authorities have also waived fees on Paris' extensive public transportation system in a bid to discourage car use. 空气污染状况的飙升引起了法国政府的重视，政府迅速出台紧急措施，比如降低机动车限速标准、禁止焚烧垃圾，法国空气质量检测机构Airparif提高了空气污染警告级别，目前为次最高危险级别。其它举措还包括公共交通免费，以减少私车数量。 Airparif blamed the smog on seasonal weather patterns and emissions from farms and vehicle traffic. An area of high pressure has trapped the smog in the atmosphere over northern France. That high pressure area caused sinking air, trapping pollutants and haze in the lower levels of the atmosphere. This, combined with recent cold, wet weather has led to high levels of polluting compounds such as ammonium nitrate. Airparif认为雾霾的成因主要是季节性天气类型和农场以及车辆通行排放的尾气。由于法国北部最近气压较高，雾霾被困在大气中无法消散。高压地区会造成空气沉降，将污染物和霾困在较低的空气中。再加上最近法国寒冷潮湿的天气，导致了硝酸铵等污染化合物水平居高不下。 请看看旁边的莫斯科，恐怖的452，也是爆表的节奏吗？ The agency measures the concentration of particles with a diameter of 10 microns or less. These particles are dangerous because they can lodge deep inside human lungs and and cause breathing problems for those with asthma, as well as cancer, in cases of long-term exposure. Airparif对直径在10微米以下的大气颗粒物浓度进行了测量，这些颗粒由于会进入人体肺部，给哮喘患者造成呼吸系统问题，长期接触这些细颗粒物还可能致癌，所以说是非常危险的小颗粒。 The safe limit for these PM10 particles is 80 micrograms per cubic meter. On Wednesday, Airparif forecast maximum levels to reach between 80 and 95. PM10的安全极限是每立方米80微克，本周三Airparif 预测PM10的最高水平在80-95之间。 A similar influx of air pollution hit Paris around the same time last year, leading authorities to impose limits on the number of cars allowed on the road. At the time, it was the worst air pollution event to hit Europe since 2007. 去年也是这个时候，巴黎也遇到过一次类似的污染，导致当局直接限制了上路的机动车数量。当时的那次空气污染是2007年以来席卷欧洲地区的最严重的一次。 [背景]根据世界卫生组织发布的报告显示，北京PM10平均水平为121微克/立方米，巴黎的平均水平为38微克/立方米。 @煎蛋网，Mashable 长按二维码，购买中国日报独家'热词红宝书'↓ |
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