Swedish climate activist Greta Thunberg and 15 other children filed a complaint with the United Nations Monday alleging that five of the world’s major economies have violated their human rights by not taking adequate action to stop the unfolding climate crisis.

At a press conference across the street from the summit, Thunberg and the other children joining the petition expressed their blunt frustration with the lack of urgency that world leaders have shown in fighting climate change.

“The message that we want to send is that we’ve had enough,” Thunberg said.

Carl Smith, a member of the indigenous Yupiaq tribe who lives in Akiak, Alaska, explained how warming has imperiled the subsistence hunting and fishing that his community depends on.

He blamed the inaction from leaders on greed.

“I think they’re acting slowly because they don’t want to lose money,” Smith said. “And I think they should go see what [climate change] is doing to little villages and cities.”