Sixteen-year-old climate activist Greta Thunberg threw down the gauntlet to the global elite gathered in the Swiss Alps for the World Economic Forum (WEF) this week, urging them to work towards meaningful climate action in order to “safeguard the future living conditions for humankind.”

“Some people say that the climate crisis is something that we all have created. But that is just another convenient lie,” the Swedish teen says in a video posted to Twitter. The video was also posted on the WEF Facebook page and was intended to be shown to the attendees inside.

In fact, there is blame to be assigned, she says, namely to “some companies and decision makers” who have “known exactly what priceless values they are sacrificing.”

She calls on those powerful interests to set aside their drive for massive economic profits and instead “safeguard the future living conditions for humankind” by committing to “real and bold climate action.”

She expresses skepticism that that will happen, but said she hopes she’s proven wrong “for the sake of your children, for the sake of your grandchildren, for the sake of life and this beautiful living planet.” Doing so would allow them to “stand on the right side of history,” she adds.

Thunberg posted the video a day ahead of her arrival—by train—in Davos, where she’ll take part in a panel discussion. Meanwhile, her joint op-ed with former United Nations climate chief Christiana Figueres declared it “outrageous” that the climate crisis is not taking center stage at the WEF gathering.