The 1994 CIA World Factbook

by United States. Central Intelligence Agency

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Air Pollution-Nitrogen Oxides

see Convention on Long-Range Transboundary Air Pollution (Nitrogen Oxides Protocol)

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Air Pollution-Sulphur

see Convention on Long-Range Transboundary Air Pollution (Sulphur Protocol)

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Air Pollution-Volatile Organic Compounds

see Convention on Long-Range Transboundary Air Pollution (Volatile
Organic Compounds Protocol)
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Antarctic-Environmental Protocol

see Protocol on Environmental Protection to the Antarctic Treaty