Swedish teenage climate change activist Greta Thunberg joined other youth leaders to urge U.S. lawmakers to support "transformative climate action" during two days of meetings and speeches on Capitol Hill, starting on Tuesday.

The events are intended to drum up support ahead of a global "climate strike" on Friday in which students and workers around the world will walk out to demand more action to fight global warming and pressure leaders attending the annual United Nations summit in New York later this month.

Democratic Sen. Ed Markey, chair of the Senate Climate Change Task Force, hosted a news conference kicking off the meetings with the activists on Tuesday morning, before including them at the task force's weekly meeting to discuss their "intergenerational" effort to combat climate change.