Columbia subject headings:
Conservation of natural resources--International cooperation.
Economic assistance, American.
Environmental policy--International cooperation.
Environmental policy.
Natural resources.
Population forecasting.
Technical assistance, American.
Twenty-first century--Forecasts.
Harvard subject headings:
Conservation of natural resources--International cooperation.
Conservation of natural resources--United States.
Economic assistance, American.
Environmental policy--International cooperation
Environmental policy--United States
Population forecasting.
Technical assistance, American.
Twenty-first century--Forecasts
Princeton subject headings: