
Diagram of atmospheric haze at Bowerchalke, Wiltshire, by James Lovelock
1960-1969
1960-1969
1981
1988
1975
circa 1980
1966
1955-1965
1981
1971
1946-1969
1971
circa 1980s
circa 2000
1970
1980-1989
1960-1969
1960-1969
1930-1937
1939
1972
1948-1950