Columbia subject headings:
Canada--Economic conditions--1945-
Environmental policy--Canada.
Natural resources--Canada.
Twenty-first century--Forecasts.
Harvard subject headings:
Environmental policy--Canada
Food supply--Canada.
Global 2000 Study (U.S.)
Natural resources--Canada.
Princeton subject headings:
Canada--Economic conditions--1971-.
Canada. Natural Resources Canada.
Environmental policy--Canada.
Twenty-first century--Forecasts.