Youth climate activist Greta Thunberg called on Congress to step up its efforts in the fight against climate change while speaking at a Senate forum on Tuesday.

“I know you are trying but just not hard enough,” she told senators while attending a meeting held by the Senate Climate Change Task Force in Washington, according to The Associated Press. She was reportedly one of a number of climate activists invited to speak to the group.

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Thunberg, a 16-year-old from Sweden whose climate activism sparked demonstrations across the globe, reportedly went on to tell lawmakers at the forum to “save your praise,” adding that she and other protesters “don’t want it.”

“Don’t invite us here to just tell us how inspiring we are without actually doing anything about it because it doesn’t lead to anything,” she said, according to The Guardian.

“If you want advice for what you should do, invite scientists, ask scientists for their expertise. We don’t want to be heard. We want the science to be heard,” Thunberg added.

Sen. Ed Markey Edward (Ed) John MarkeyA game theorist's advice to President Trump on filling the Supreme Court seat Watchdog confirms State Dept. canceled award for journalist who criticized Trump 3 reasons why Biden is misreading the politics of court packing MORE (D-Mass.), who attended the event, told Thunberg that lawmakers "hear what you’re saying" and "will redouble our efforts," The Guardian reported.

Thunberg is also reportedly expected to meet later this week with Rep. Alexandria Ocasio-Cortez Alexandria Ocasio-CortezOn The Money: Anxious Democrats push for vote on COVID-19 aid | Pelosi, Mnuchin ready to restart talks | Weekly jobless claims increase | Senate treads close to shutdown deadline McCarthy says there will be a peaceful transition if Biden wins Anxious Democrats amp up pressure for vote on COVID-19 aid MORE (D-N.Y.), who co-sponsored the Green New Deal with Markey earlier this year.

The teenage climate activist is scheduled to testify at a joint hearing on Wednesday morning before House lawmakers to discuss the global youth climate movement.