A matter of days after giving U.S. lawmakers a dressing down in Congress, Swedish climate activist Greta Thunberg delivered a scathing speech at the UN Climate Action Summit on Monday. <br />She slammed the failure of the world leaders and vowed that if UN doesn't tackle climate change, young people will "never forgive them."<br />For more on this and other news around the world, let's turn to our Kim Da-mi.<br />Da-mi, tell us more about this speech. <br /><br /> Mark, through tears and visible frustration, the 16-year-old activist blasted world leaders for failing to save the world against the climate crisis. <br /> Her message was direct and powerful -- that it's wrong that world leaders come to young people for hope...when they're out of school to fight against a global catastrophe. <br /><br />"How dare you. You have stolen my dreams and my childhood with your empty words. We are in the beginning of a mass extinction, and all you can talk about is the money and fairy tales of eternal economic growth."<br /><br />Thunberg then pointed out how the world has disregarded the crisis, noting that the science has been crystal clear for over 30 years. <br />She said world leaders weren't meeting their promises. <br /><br />"You say you hear us, and that you understand the urgency, but no matter how sad, and angry I am I do not want to believe that, because if you really understood the situation and still kept on failing to act, then you would be evil, and that I refuse to believe."<br /><br /> Over the past year, young activists have staged scattered climate strikes in solidarity with her Fridays for Future Movement. <br />Another strike is scheduled to be held on Friday with thousands of students expected to take part. <br />
