The safe limit for PM10 is set at 80 microgrammes per cubic metre (mcg/m3).
PM10的安全上限是80微克每立方米。
Since Wednesday morning, authorities have put in place certain emergency measures, such as limiting cars to 20kph (12mph) on motorways in the Paris area.
自从周三早晨开始,官方就已经落实了一些紧急措施,比如限制巴黎地区公路上汽车20公里/时.
Authorities have the power to put into place emergency measures such as allowing only one in two cars to enter the French capital and making public transport free.
官方有权将紧急措施付诸实践,比如只允许一半车辆开进法国首都,还有坐公交免费。。
This was last implemented on 17 March last year during a particularly bad spike in the pollution levels.
去年污染指数尤其飙升的时候,于3月17日他们执行了这些措施。
According to a 2011 World Health Organisation report, the planet’s most polluted city was Ahvaz in Iran with an average of 372 mcg/m3.
据世界卫生组织2011的报告,世界上污染最严重的城市是伊朗的阿瓦士,平均372微克每立方米。
Beijing had an average of 121 mcg/m3, while Paris was measured at 38 mcg/m3.
北京的平均值是121微克每立方米,而巴黎是38微克每立方米。
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