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  • China air pollution:air quality Index explained
  • 點閱:1
  • 作者:
  • 出版社:Next Animation Studio
  • 出版年:2013
  • 集叢名:Dangerous natural phenomena Natural and Social Science Animation.2,危險的自然災害
  • 格式:JPG
租期14天 今日租書可閱讀至2020-06-09

Air quality in Beijing has risen above hazardous levels in the last few days, reaching 755 on an index that measures particulate matter in the air with a diameter of 2.5 micrometers (PM2.5). A measurement above 100 is considered unhealthy, while measurement above 300 is considered dangerous meaning children and the elderly are advised to remain indoors. The unofficial index is hosted by the US Embassy. This animation explains what PM2.5 pollutants are and their potential effects on the body.

 

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租期14天
今日租書可閱讀至2020-06-09
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