Columbia subject headings:
Ecuador--Economic conditions.
Environmental degradation--Ecuador.
Land degradation--Environmental aspects--Ecuador.
Mineral industries--Ecuador.
Natural resources--Environmental aspects--Ecuador.
Petroleum industry and trade--Political aspects--Ecuador.
Sustainable development--Ecuador.
Harvard subject headings:
Ecuador--Economic conditions.
Environmental degradation--Ecuador.
Land degradation--Environmental aspects--Ecuador.
Mineral industry--Ecuador.
Natural resources--Environmental aspects--Ecuador.
Petroleum industry and trade--Political aspects--Ecuador.
Sustainable development--Ecuador.
Princeton subject headings:
Ecuador--Economic conditions.
Natural resources--Ecuador.
Petroleum industry and trade--Political aspects--Ecuador.