Swedish climate activist Greta Thunberg, centre, joins a "fridays for future" demo on the final day of the 50th annual meeting of the World Economic Forum, WEF, in Davos, Switzerland, Friday, Jan. 24, 2020. The meeting brings together entrepreneurs, scientists, corporate and political leaders in Davos from January 21 to 24. (Gian Ehrenzeller/Keystone via AP)