关于空气微粒含量PM10的定义可看旧贴:
北京smog水平的走向图.
这是7月18-8月18日的走势图,奥运时期空气的确比平常好得多.除了下面所提的季节性,北京停止工厂生产和限制高达90%车子运行应该是很管用:
City | Country | PM10 |
Cairo | Egypt | 169 |
Delhi | India | 150 |
Kolkata | India | 128 |
Tianjin | China | 125 |
Chongqing | China | 123 |
Kampur | India | 109 |
Lucknow | India | 109 |
Jakarta | Indonesia | 104 |
Shenyang | China | 101 |
Zhengzhou | China | 97 |
Jinan | China | 94 |
Lanzhou | China | 91 |
Beijing | China | 89 |
Taiyuan | China | 88 |
Other Olympic cities | ||
London | United Kingdom | 21 |
Athens | Greece | 43 |
Sydney | Australia | 20 |
Seoul | Korea | 41 |
Source: World Bank 2004 |