And the 16-year-old Swedish climate activist Greta Thunberg has arrived in Davos, Switzerland, where she’s calling on heads of state and global elites gathered for the World Economic Forum to take urgent action on climate change. Ahead of her trip to the forum, Thunberg posted a video online accusing corporate and government leaders of essentially doing nothing to prevent a climate catastrophe.

Greta Thunberg: “Some people say that the climate crisis is something that we all have created. But that is just another convenient lie, because if everyone is guilty, then no one is to blame. And someone is to blame. Some people—some companies and some decision-makers in particular—has known exactly what priceless values they are sacrificing to continue making unimaginable amounts of money. I want to challenge those companies and those decision-makers into real and bold climate action, to set their economic goals aside and to safeguard the future living conditions for humankind. I don’t believe for one second that you will rise to that challenge. But I want to ask you all the same. I ask you to prove me wrong.”

Greta Thunberg made international headlines last year after she launched a one-day-a-week school strike against climate change, held every Friday outside the Swedish parliament. The strike quickly spread and became a global phenomenon. Click here to see our interview with Greta Thunberg and her address to world leaders gathered at the U.N. climate summit in Poland last month.