• Visit of Environmental Investigation Agency (EIA), Washington DC, U.S.A. Jan 03~Jan 06 2017.

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• Visit of World Resources Institute (WRI), Washington DC, U.S.A. Jan 03~Jan 06 2017.

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• Visit USDA Forest Production Laboratory (FPL), Madison WI, U.S.A. Feb 14~Feb 17, 2017.

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