Air quality classification
Extremely poor
Fair
Moderate
Poor
Very poor
London
Industrial
revolution
Clean Air
Act 1993
125
100
100
75
50
25
0
1860
1900
1940
1980
2020
Jakarta
Increased pollution
from industrialisation
100
100
100
75
50
25
0
1860
1900
1940
1980
2020
Islamabad
Elevated pre-industrial levels due to dust
Rapid
industrialisation
125
100
100
75
50
25
0
1860
1900
1940
1980
2020
Beijing
Rapid
industrialisation
PM2.5 reduced
after legislation
125
100
75
50
25
0
1860
1900
1940
1980
2020
Delhi
1956-61, second five-year
"rapid industrialisation" plan
125
100
75
50
25
0
1860
1900
1940
1980
2020
Air quality classification
Fair
Moderate
Poor
Very poor
Extremely poor
London
Industrial
revolution
Clean Air Act 1993 targets industrial & transport emissions
125
100
100
75
50
25
0
1860
1880
1900
1920
1940
1960
1980
2000
2020
Jakarta
Increased pollution from industrialisation
125
100
100
75
50
25
0
1860
1880
1900
1920
1940
1960
1980
2000
2020
Islamabad
Elevated pre-industrial levels due to natural dust
Rapid
industrialisation
125
100
100
75
50
25
0
1860
1880
1900
1920
1940
1960
1980
2000
2020
Beijing
Rapid
industrialisation
PM2.5 reduced
after legislation
125
100
100
75
50
25
0
1860
1880
1900
1920
1940
1960
1980
2000
2020
Delhi
1956-61, second five-year
"rapid industrialisation" plan
125
100
75
50
25
0
2000
1860
1880
1900
1920
1940
1960
1980
2020
Air quality
classification
Fair
Moderate
Poor
Very poor
Extremely poor
London
125
Industrial revolution caused increased pollution
Frequent smog events
Clean Air Act 1993 targets industrial and transport emissions
100
75
50
25
0
1860
1880
1900
1920
1940
1960
1980
2000
2020
Jakarta
125
Low pre-industrial concentrations
due to coastal location
Industrialisation leads to increasing concentrations
100
75
50
25
0
1860
1880
1900
1920
1940
1960
1980
2000
2020
Islamabad
125
Elevated pre-industrial concentration due to natural particulates
Rapid industrialisation has driven rising concentrations
100
75
50
25
0
1860
1880
1900
1920
1940
1960
1980
2000
2020
Beijing
125
Increased pollution following rapid industrialisation
100
75
50
PM2.5 reduced after legislation
25
0
1860
1880
1900
1920
1940
1960
1980
2000
2020
Delhi
125
Stubble burning may have contributed to elevated pre-industrial concentrations
1956-61, second
five-year "rapid industrialisation" plan
100
75
50
25
0
1860
1880
1900
1920
1940
1960
1980
2000
2020
Air quality
classification
Fair
Moderate
Poor
Very poor
Extremely poor
London
125
Frequent smog events
Industrial revolution caused increased pollution
Up to 12,000
dead in the
'Great Smog'
of 1952
Clean Air Act targets 1993 industrial and transport emissions
100
75
50
25
0
1850
1860
1870
1880
1890
1900
1910
1920
1930
1940
1950
1960
1970
1980
1990
2000
2010
2020
Jakarta
125
Low pre-industrial concentrations
due to coastal location
Industrialisation leads to increasing concentrations
100
75
50
25
0
1850
1860
1870
1880
1890
1900
1910
1920
1930
1940
1950
1960
1970
1980
1990
2000
2010
2020
Islamabad
125
Elevated pre-industrial concentration due to natural particulates
Rapid industrialisation has driven increasing concentrations
100
75
50
25
0
1850
1860
1870
1880
1890
1900
1910
1920
1930
1940
1950
1960
1970
1980
1990
2000
2010
2020
Beijing
125
Increased pollution following rapid industrialisation
2008 Olympic
Games highlights
air pollution
100
75
50
25
PM2.5 reduced after legislation
0
1850
1860
1870
1880
1890
1900
1910
1920
1930
1940
1950
1960
1970
1980
1990
2000
2010
2020
Delhi
125
Stubble burning may have contributed to elevated pre-industrial concentrations
1956-61 second five-year
"rapid industrialisation" plan
100
75
50
25
0
1850
1860
1870
1880
1890
1900
1910
1920
1930
1940
1950
1960
1970
1980
1990
2000
2010
2020