Maria-Francesca Spatolisano, Assistant Secretary-General for Policy Coordination and Inter-Agency Affairs in the UN Department of Economic and Social Affairs (UNDESA), briefs journalists on the World Population Prospects 2019: Highlights, at the UN headquarters in New York, June 17, 2019. The world's population is expected to increase by 2 billion in the next 30 years, from 7.7 billion currently to 9.7 billion in 2050, according to a United Nations report released here on Monday. (Xinhua/Li Muzi)