When Greta Thunberg, a 15-year-old climate activist from Sweden, had the chance to address a global climate change conference this past week, she told officials she had not come to beg.
"You have ignored us in the past, and you will ignore us again," she said.
But she warned them that "you say you love your children above all else, and yet you are stealing their future in front of their very eyes".
The teenager's remarks quickly gained attention on social media, and was shared by leading climate scientists and some elected officials. US Senator Bernie Sanders tweeted footage of her speech, saying she "called out world leaders for their global inaction on climate change".
Greta accused leaders of only speaking about "green eternal economic growth because you are too scared of being unpopular".