The Government and the Environment

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