Youth hold a banner reading "Climate strike, we are fighting for our future" during a march as part of a global day of student protests aiming to spark world leaders into action on climate change on March 15, 2019 in Elmshorn, Germany. - The worldwide protests were inspired by Swedish teen activist Greta Thunberg, who camped out in front of parliament in Stockholm last year to demand action from world leaders on global warming. (Photo by Carsten Rehder / dpa / AFP) / Germany OUT (Photo credit should read CARSTEN REHDER/AFP/Getty Images)

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