Columbia subject headings:
Environmental policy--Ecuador.
Petroleum industry and trade--Environmental aspects--Amazon River Watershed.
Petroleum industry and trade--Environmental aspects--Ecuador.
Harvard subject headings:
Environmental policy--Ecuador
Petroleum industry and trade--Environmental aspects--Amazon River Watershed.
Petroleum industry and trade--Environmental aspects--Ecuador.
Princeton subject headings:
Environmental policy--Ecuador.
Petroleum industry and trade--Environmental aspects--Amazon River Watershed.
Petroleum industry and trade--Environmental aspects--Ecuador.