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TOPSHOT - Swedish climate activist Greta Thunberg poses for a photograph during an inteview with AFP onboard the Malizia II sailing yacht at the Mayflower Marina in Plymouth, southwest England, on August 13, 2019 ahead of her journey across the Atlantic to New York where she will attend the UN Climate Action Summit next month. - A year after her school strike made her a figurehead for climate activists, Greta Thunberg believes her uncompromising message about global warming is getting through -- even if action remains thin on the ground. The 16-year-old Swede, who sets sail for New York this week to take her message to the United States, has been a target for abuse but sees that as proof she is having an effect. (Photo by Ben STANSALL / AFP) (Photo credit should read BEN STANSALL/AFP via Getty Images)