One of the most popular iPad apps in Beijing at present is China Air Pollution Index. The app is both addictive and disturbing. When I checked into a Beijing hotel recently, I found that – even from the 40th floor – I couldn’t see further than one block because of the grey smog enveloping the city. So I checked the numbers and discovered that the AQ level, which measures fine particulates that are especially dangerous, was 250 – about five times the level deemed safe.
目前在北京最受欢迎的一款iPad应用是“manbetx3.0 空气污染指数”。这款应用既令人着迷，又令人不安。最近，我在入住北京一家宾馆时发现，即便站在40层楼上，也无法看清一个街区以外的地方，因为这座城市已被灰色的雾霾包裹住了。于是我查看了一下数据，发现空气污染水平（衡量尤为危险的细微颗粒）是250，约为安全水平的5倍。
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