Greta Thunberg, a 16-year-old climate activist from Sweden who gained international attention when she delivered a scathing speech to world leaders at the United Nations in New York, is visiting the Pine Ridge Indian Reservation for a climate change forum on Sunday.

Thunberg will participate in a pair of panels with fellow youth climate activist and Indigenous rights advocate Tokata Iron Eyes, the Lakota People's Law Project said in a news release.

The panel will be held at 5 p.m. Sunday at the Red Cloud Indian School Field House on the Pine Ridge Reservation.

On Tuesday, Thunberg and Iron Eyes will hold another forum with Standing Rock high school students in attendance on the reservation in Fort Yates, N.D.

During both panels, the Dakota Access Pipeline and the Keystone XL pipeline and their affects on the climate will be the main topics, according to the Lakota People's Law Project.

Thunberg and Iron Eyes first spoke together at an Amnesty International event at George Washington University. Thunberg traveled to the United States in August on a sailboat in an attempt to call attention to climate change.

Thunberg visited Iowa City on Friday to join the Iowa City Climate Strike event, and more than 3,000 people showed up.

"We teenagers and children shouldn't have to take the responsibility but right now the world leaders keep acting like children and someone needs to be the adult in the room," Thunberg said, according to the Des Moines Register. "The world is waking up. We are the change and change is coming whether they like it or not."