Cornel Feruta, acting director general of the International Atomic Energy Agency (IAEA), gives a speech at the International Conference on Climate Change and the Role of Nuclear Power at the Vienna International Centre in Vienna, Austria, Oct. 7, 2019. Some 550 participants representing 79 countries and 18 international organizations are taking part in the week-long conference, the first on this topic organized by the IAEA. (Xinhua/Guo Chen)