Story maps
故事地圖



(added on 2011/11/17)

Build our nations with fresh air 共建清新國度

©2011 SpatioEpi.com
Data source: WHO & International Energy Agency
Map created by CUHK SpatioEpi Group

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Apart from ozone, nitrogen dioxide and sulphur dioxide, particulate matter (PM) is another common urban air pollutant. The map shows the mean annual exposure to PM10 in urban population and the proportion of fossil fuel used in national energy consumption.

As depicted by graduated colours, the concentration of PM10 in outdoor air was higher in Asian urban areas. Of these, some were from countries with high dependence on fossil fuel, as indicated by coloured symbols. According to World Health Organization guidelines, the air quality standard for annual average of PM10 is below 20 micrograms per cubic metre. Cities achieving this standard were however limited to those in North America, Oceania and a few countries in Europe. In addition to developing cleaner fuels, energy saving through lifestyle change and enforcing air quality regulations are two feasible ways to change the current situation.

The data for the map were obtained from World Health Organization and International Energy Agency.

除臭氧、二氧化氮及二氧化硫外,顆粒物亦是一種常見的城市空氣污染物。地圖顯示城市人口暴露於可吸入顆粒物的年均濃度及各國消耗能源時使用化石燃料的比例。

依圖中顏色所示,亞洲地區的城市中,戶外空氣含較高濃度的可吸入顆粒物。當中,不少城市均來自高度依賴化石燃料的國家。根據世界衛生組織的空氣質量準則,可吸入顆粒物的年均濃度應低於每立方米二十微克,但現時只有位於北美、大洋洲及部分歐洲國家的城市能達致此水平。除了開發更潔淨的燃料外,改變生活模式以節約能源及切實執行空氣質素監控都有助改善現有情況。

地圖數據源自世界衛生組織及國際能源署。