Gaoyuan Yao, Mayor of Hangzhou, Zheijang Province and Lidia Arthur Brito, Assistant Director-General for Natural Sciences, UNESCO

Gaoyuan Yao, Mayor of Hangzhou, China, and Lidia Arthur Brito, Assistant Director-General for Natural Sciences, UNESCO

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Photo by IISD/ENB - Andrés Felipe Carvajal Gómez

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