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主要污染物中的二氧化硫全年平均含量

Statistics
年份 1986 1991 1996 1997 1998 1999 2000 2001
百萬克/ 立方米 20 19 18 17 13 18.45 16.09 16.33
年份 2002 2003 2004 2005 2006 2007 2008 2009
百萬克/ 立方米 17.35 17.33 24.33 21.50 22.07 21.80 20.06 13.83
年份 2010 2011 2012 2013 2014 2015 2016 2017
百萬克/ 立方米 11.92 13.23 11.19 12.64 11.32 9.30 8.57 7.60

操作定義

The Air Pollution Index (API) converts air pollution data from several types of pollutants into a value ranging from 0 to 500. These pollutants are Nitrogen Dioxide (NO2), Ozone (O3), Respirable Suspended Particulate (RSP), Carbon Dioxide (CO2). The highest number among all the four pollutants is reported as the API hourly. Figures shown in the table are ratio of Annual Average Concentration of the pollutants to the Air Quality Objectives set by the Environmental Protection Department and annually average concentration rates of SO2.
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