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Most Polluted Cities in the World

Can you guess the most polluted cities in the world?
Cities with a metro area population of over 1million
Air quality is represented by the annual mean concentration of particulate matter (PM2.5, i.e. particles smaller than 2.5 micrometers).
Quiz by stubart409
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Last updated: July 22, 2020
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First submittedJuly 22, 2020
Times taken47
Average score35.0%
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Rank
Country
PM2.5
Answer
1
India
173
Kanpur
2
India
172
Faridabad
3
India
146
Varanasi
4
India
144
Patna
5
India
143
Delhi
6
India
138
Lucknow
7
Cameroon
132
Bamenda
8
India
131
Agra
9
Pakistan
111
Peshawar
10
Pakistan
107
Rawalpindi
Rank
Country
PM2.5
Answer
11
India
105
Jaipur
12
Uganda
104
Kampala
13
India
98
Jodhpur
14
China
93
Baoding
15
Qatar
93
Doha
16
Mongolia
92
Ulaanbaatar
17
China
90
Ji'nan
18
China
89
Shijiazhuang
19
Pakistan
88
Karachi
20
China
87
Hengshui
+1
Level 29
Jul 22, 2020
Baku, Azerbaijan?
+1
Level 66
Aug 4, 2020
I used this source: https://en.wikipedia.org/wiki/List_of_most-polluted_cities_by_particulate_matter_concentration. Baku does not make the top 500. Looking at another source, Numbeo, it rates Baku's air pollution level at 72.62 which is classed as high. By comparison though, it lists Karachi, which is 19 on this list as having an air pollution level of 78.18.