Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Teen Climate Activist Thunberg Leads Rally at UN Margaret Besheer UNITED NATIONS - Swedish climate activist Greta Thunberg joined several hundred other young people Friday outside the United Nations to demand action on global warming. To chants of "Greta! Greta!" the petite 16-year-old climate rock star made her way through a sea of young people, many of whom said they had drawn inspiration from her activism. She rose to fame last year after she started skipping school on Fridays, leading strikes over the lack of action on climate change. Greta arrived in New York on Wednesday, ahead of a Sept. 21 Youth Climate Summit at the United Nations, which she will address. Adult leaders will meet two days later to have a climate summit of their own. She has said she will not fly because air travelleaves too big a carbon footprint,and she put her principles to the test, crossing the Atlantic in a zero-emissions, no-frills sailboat with her father and a small crew. The trip took two weeks and the seas were often rough. On Friday, she looked tired and perhaps a bit overwhelmed by the large and enthusiastic crowd and the aggressive pack of photographers and reporters. She answered a few questions, but her comments were mostly inaudible because there was no sound system and she is not one to shout her message. But it did not dampen the enthusiasm of the many young people who had come to see her. .