The Government and the Environment

Main

Water

1965
1965
1972
1986
1988

Land

1916
1935
1947
1964
1974
1976
1976
1976
1977

Energy

1978

Basic

1957
1969
1976
1977
1980
1980
1990
1990
1990

Air

1955
1987
1997

Biodiversity

1956
1966
1972
1975
1978
1978
1980
1983
1990

Human Safety/Aesthetics

1965
1966
1968
1974
1982
1985
1989
1994
1996