Ukraine’s president made a surprise video appearance Saturday at Qatar’s Doha Forum, calling on the energy-rich nation and others to boost their production to counteract the loss of Russian energy supplies. Volodymyr Zelensky called on the United Nations and world powers to come to his aid, as he has in a series of other addresses given around the world since the start of the war on 24 February. He compared Russia’s destruction of the port city of Mariupol to the Syrian and Russian destruction wrought on the city of Aleppo in the Syrian war. “They are destroying our ports,” Zelensky said. “The…