UN report sounds alarm

2015-2019 is set to be the hottest five-year period

■ The report titled United in Science was compiled by the World Meteorological Organization

■ The report is meant to inform Monday’s UN summit on climate change in New York ■ Some world leaders are expected to announce new commitments in efforts to curb climate change

■ Swedish activist Greta Thunberg, along with other youth activists, will speak at the opening of the meeting