1970-1972 Secretary-General, United Nations Conference on
the Human Environment
1973-1975 Executive Director, United Nations Environment
Programme, Nairobi, Kenya
1976-1978 President, Chairman of the Board and Chairman of
the Executive Committee, Petro-Canada
1983-1987 Member World Commission on Environment and
Development
1985-1986 Executive Coordinator, United Nations Office for
Emergency Operations in Africa
1992 Secretary General, United Nations Conference on
Environment and Development
1992-1995 Chairman, Ontario Hydro
1998-2001 Mamber International Advisory Board, Federation
of Korean Industry

Under-Secretary General and Special Advisor to the
Secretary General, United Nations
Member, Toyota International Advisory Board
Member, International Advisory Council, Liu Centre for the
Study of Global Issues, The University of British Columbia

1976 First United Nations International Environment
Prize
1982 Gold Environmental Leadership Decade Award,
United Nations Environment Programme
1994 Lifetime Achievement Award, Environment Canada
1995 IKEA Environmental Award
2001 IAIA Global Environment Award
2001 Lifetime Achievement Award, National Council for
Science & Environment
2002 Special Award Global Environment Leadership Award
2003 First Kitakyushu Environmental Award, Kitakyushu,
Japan
2003 Public Welfare Medal, National Academy of Sciences