Chinese villagers look on as an agricultural drone is used to spray pesticide on crops in a village in Chiping county, east China's Shandong province on April 6, 2017. Developing Asian countries will drive the world economy in the next two years, the Asian Development Bank said on April 6, but it warned of uncertainties from the United States and Europe. / AFP PHOTO / STR / China OUT (Photo credit should read STR/AFP/Getty Images)
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