The Eiffel Tower was barely visible amidst a thin blanket of smog that descended on Paris and other parts of northern France on Wednesday.

本周三巴黎和法國北部部分地區(qū)被濃厚的霧霾籠罩，埃菲爾鐵塔只能依稀可見,。

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.

空氣污染狀況的飆升引起了法國政府的重視,，政府迅速出臺緊急措施,，比如降低機動車限速標準,、禁止焚燒垃圾，法國空氣質(zhì)量檢測機構(gòu)Airparif提高了空氣污染警告級別,，目前為次最高危險級別,。其它舉措還包括公共交通免費，以減少私車數(shù)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認為霧霾的成因主要是季節(jié)性天氣類型和農(nóng)場以及車輛通行排放的尾氣,。由于法國北部最近氣壓較高，霧霾被困在大氣中無法消散,。高壓地區(qū)會造成空氣沉降,，將污染物和霾困在較低的空氣中。再加上最近法國寒冷潮濕的天氣,，導致了硝酸銨等污染化合物水平居高不下,。

請看看旁邊的莫斯科，恐怖的452,，也是爆表的節(jié)奏嗎？

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對直徑在10微米以下的大氣顆粒物濃度進行了測量,，這些顆粒由于會進入人體肺部,，給哮喘患者造成呼吸系統(tǒng)問題,，長期接觸這些細顆粒物還可能致癌，所以說是非常危險的小顆粒,。

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的安全極限是每立方米80微克,，本周三Airparif 預測PM10的最高水平在80-95之間。

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.

去年也是這個時候,，巴黎也遇到過一次類似的污染,，導致當局直接限制了上路的機動車數(shù)量。當時的那次空氣污染是2007年以來席卷歐洲地區(qū)的最嚴重的一次,。

[背景]根據(jù)世界衛(wèi)生組織發(fā)布的報告顯示,，北京PM10平均水平為121微克/立方米，巴黎的平均水平為38微克/立方米,。

@煎蛋網(wǎng),，Mashable

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