![In this Saturday, Sept. 21, 2019 file photo, environmental activists stage a rally demanding action in stopping the climate crisis in Seoul, South Korea. The world's younger generations have become a vocal force in the debate over global warming.](https://www.gpb.org/sites/default/files/styles/flexheight/public/2021-10/climatechange_ap_19331474453587.jpg?itok=dR1SS5sb)
Caption
In this Saturday, Sept. 21, 2019 file photo, environmental activists stage a rally demanding action in stopping the climate crisis in Seoul, South Korea. The world's younger generations have become a vocal force in the debate over global warming.
Credit: Ahn Young-joon, AP