United Nations Secretary-General, Antonio Guterres, left, receives a hongi from Arapata Reuben on his arrival at a climate change and agriculture event hosted by Ngai Tahu iwi and the Global Research Alliance on Agricultural Greenhouse Gases in Christchurch, New Zealand, Tuesday, May 14, 2019.
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Cambio climático, un problema capital para el secretario general de Naciones Unidas

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