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.
目前在北京最受歡迎的一款iPad應用是「中國空氣汙染指數」。這款應用既令人著迷，又令人不安。最近，我在入住北京一家賓館時發現，即便站在40層樓上，也無法看清一個街區以外的地方，因爲這座城市已被灰色的霧霾包裹住了。於是我檢視了一下數據，發現空氣汙染水準（衡量尤爲危險的細微顆粒）是250，約爲安全水準的5倍。
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