Everything Climate Activist Greta Thunberg Said Before Congress | NBC New York

See everything teenage climate activist Greta Thunberg said before a Congressional hearing Wednesday in Washington.

More: Swedish teenager Greta Thunberg offered a blunt message to Congress on Tuesday as she brought her campaign for urgent action on climate change to the U.S. Capitol.

"I know you're trying," she told Democratic senators at an invitation-only forum, "but just not hard enough. Sorry."

Massachusetts Sen. Ed Markey thanked the 16-year-old activist for her advice and her activism, which has gained worldwide attention by inspiring a series of protests and school strikes, including one set for Friday.

Thunberg and other young activists bring "moral clarity" to the fight against global warming, Markey said.

"We hear you," he told her, vowing that lawmakers "will redouble our efforts to make sure that we inject this issue into the politics of this building and this country because time is running out."