The 2015 edition of the annual Vienna Yearbook of Population Research is a special issue on differential demographic vulnerability to climate-related disasters. Many of the 16 articles are worth reading, but here are 2 of particular interest.

The world is undergoing a period of demographic transition which presents both opportunities and challenges for governments. A report by the Atlantic Council’s Mathew Burrows, formerly of the National Intelligence Council, Reducing the Risks from Rapid Demographic Change, examines the changes in population structures across high-, upper-middle-, lower-middle-, and low-income countries.

On October 13, the United Nations General Assembly appointed Antonio Guterres as the next UN secretary-general. When the former prime minister of Portugal and high commissioner for refugees begins his term in January 2017, he will face a world of increasing climate and security crises. In a Wilson Center NOW interview and op-ed for The Daily Climate, Wilson Fellows Ruth Greenspan Bell and Sherri Goodman express optimism in Guterres’ ability to address these interconnected challenges and provide insight on the role of institutions like the United Nations in fighting climate change.

Over the next few days, many smart people will opine on the prospects for success of António Guterres, the man (yes, surprise, another man) nominated by the United Nations Security Council to be the next UN secretary-general.

When Lake Poopó, Bolivia’s second-largest lake, dried up last December, an entire community lost their way of life and the scientific community cast their eyes to the map asking, where next? They didn’t have to look far. According to a report prepared by the World Lake Vision Committee, a collaboration between the International Lake Committee Foundation, the Shiga Prefectural Government of Japan, and the United Nations Environment Program, there are very few major lake systems that are not experiencing decreasing water quality, volume, biodiversity, or some combination of the three.

Yesterday afternoon President Obama announced a new Presidential Memorandum on climate change and national security. The policy directs 20 federal agencies to consider the national security implications of climate change and establish a working group that will develop a Climate Change and National Security Action Plan for the federal government.

Heads of state gathered in New York for the September 19 United Nations Summit on Refugees and Migrants will reaffirm principles of international law, pledge to treat asylum seekers more humanely, and promise to improve coordination between humanitarian and development organizations.