Delhi tops most polluted megacity list, says WHO
![](http://admin.indiaenvironmentportal.org.in/files/air_poll_delhi_11.jpg)
In December 2015, week-long analysis of data from #breathe devices showed Delhi's air pollution was one-and-a-half times worse than in Beijing
Publication Date:
04/10/2016
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In December 2015, week-long analysis of data from #breathe devices showed Delhi's air pollution was one-and-a-half times worse than in Beijing