According to their recent Safeguarding the World’s Water report, the U.S. Agency for International Development (USAID) invested $499,995,179 in water-related programming in 54 countries in 2015.

If 2015 was the year of international cooperation, 2016 seems to have been about withdrawing from external entanglements and re-focusing on national priorities, as the global displacement crisis ground on, terror attacks battered liberal governments, and fighting in the Middle East continued.

Climate change isn’t a political issue in many countries, but it is in the United States. If that trend continues much longer, American service members may find themselves at “the intersection of politics and events” as they confront the consequences of climate change head on in the form of increased instability and humanitarian disasters, says Edward J. Erickson in a special issue of the U.S. Marine Corps Press Journal.

A recent report by the UN Food and Agriculture Organization (FAO) warns that over the next 15 years, climate change will add to the number of people living in poverty via its effects on the agriculture and food sectors. By 2030, climate-related effects on food-related livelihoods could lead to an additional 35 to 122 million impoverished people, according to the 2016 State of Food and Agriculture Report.

What happens when melting ice reveals buried nuclear waste from a foreign power originally there at the behest of a colonial power? Greenland may find out in the years ahead, according to research by Jeff and William Colgan about a Cold War-era U.S. military base long thought buried beneath an ice cap.

In 2007, a teenaged Australian became the first documented case of “climate delusion” when he was hospitalized for dehydration after refusing to drink out of fear of contributing to the nation’s drought. Carley Chavara’s story on “climate trauma” was the most-read last month after being linked to by NPR.

What is just was the subject of our top three most popular stories last month on New Security Beat. From climate policy to gender inequality, many governments and NGOs are grappling with how to address marginalization and other systemic problems through interventions that also address environment or health issues. As the Sustainable Development Goals encourage such integrated thinking – by rich and poor countries – these kinds of considerations are likely here to stay.

“There are no walls high enough to insulate any of us from the consequences of extreme climate change,” wrote Nick Mabey last month. The same could be said for the refugee and migration crisis facing many parts of the world today, including an exasperated Kenya, detailed in another of our most popular posts. These are problems that no one nation can solve.