Bangladesh, Sept. 22 -- United Nations, sep 21 (AP/UNB) - Fresh off the climate strike that took hundreds of thousands of young people out of classrooms and into the streets globally, youth leaders gathered at the United Nations Saturday to demand radical moves to fight climate change.

"We showed that we are united and that we, young people, are unstoppable," Swedish 16-year-old activist Greta Thunberg, who started the climate strike movement with her lone protest in front of her country's parliament about a year and a half ago.

More than 700 mostly young activists attended the first of its kind Youth Climate Summit, according to Luis Alfonso de Alba, the U.N. special climate summit envoy.

Friday's strike across six continents and Satu...