Davos chief welcomes Donald Trump, Greta Thunberg as climate change alarm tops agenda - USA TODAY

Davos chief welcomes Donald Trump, Greta Thunberg as climate change alarm tops agenda  USA TODAY

Davos chief welcomes Donald Trump, Greta Thunberg as climate change alarm tops agenda - USA TODAY
Davos chief welcomes Donald Trump, Greta Thunberg as climate change alarm tops agenda  USA TODAY