(Michael Sohn | AP photo) In this Friday, April 24 photo, activists place thousands of protest placards in front of the Reichstag building, home of the german federal parliament, Bundestag, during a protest rally of the 'Fridays for Future' movement in Berlin, Germany. U.N. Secretary-General Antonio Guterres said Tuesday at a two-day international meeting on climate change, that the coronavirus pandemic has exposed how fragile societies are, but that if governments work together on common challenges, including global warming, it can be an opportunity to 'rebuild our world for the better.'