BERLIN, GERMANY – MARCH 29: Swedish teenaged climate activist Greta Thunberg (C) holds up her Swedish „School Strike for the Climate“ sign as she participates in a Fridays for Future march with German climate activists Luisa Neubauer (C-L) and Jakob Blasel on March 29, 2019 in Berlin, Germany. Thousands of pupils and children took part in the demonstration to demand more action to stop climate change. (Photo by Sean Gallup/Getty Images)