Over the course of 1,800 miles, 5,300 vertical feet, and at least five name changes, the Brahmaputra River, in sometimes turbulent outbursts, flows from the Tibetan plateau to the Bay of Bengal. Along the way, it crosses three countries, including major geopolitical rivals China and India, and supplies 90 percent of downstream Bangladesh’s freshwater during the dry season.

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.

Accurate measurements of wealth are useful for developing more targeted and effective poverty reduction programs. Unfortunately, such metrics are few and far between, as data on economic livelihoods tends to be expensive to obtain, and once collected, is often unreliable.

Although separated by a thousand miles, the women of the Malaysian state of Sarawak and the Filipino island of Mindoro are united by a major struggle: climate change. As rainfall patterns grow increasingly unpredictable, natural disasters become more frequent, and drought ravages once-arable land, women are on the frontlines in both communities.

When wildfires become unstoppable, consuming forests, farmlands, communities, and anything else in their path, how will those affected cope? When typhoons slam coastal populations, dumping over a foot of rain in a single event, who will be there to help mop up? When seas rise up, drowning centuries-old communities, where will the displaced go?

Conflict is typically viewed as a failure of social and political systems and almost never as a method of transforming dysfunctional or fractured societies into cohesive units. However, in an analysis of the discourse around climate change and conflict in Local Environment, Melissa Nursey-Bray concludes that conflict is a sometimes-necessary step in a complicated process to create stable societies. Nursey-Bray separates the climate-conflict discourse into two baskets: climate change as a security risk and climate change as one of many factors that contribute to insecurity.

The Nile River is shared by 11 countries, for which it is vital for food and energy production, freshwater, and as a means of transportation. Sharing the resources of the Nile has, however, been politically difficult. Recently, the construction of the Grand Ethiopian Renaissance Dam has caused a major dispute with downstream Egypt which fears the dam will affect water flow in its own territory.

If we are to avert the worst of climate change impacts, we need better tools for identifying patterns of displacement and migration around climate extremes. In vulnerable developing countries, increasingly frequent and intense storms will likely exacerbate current patterns of displacement and permanent migration. Displacement often leads to humanitarian crises in the short term and can derail progress toward development in the long term. Because of this dangerous potential, displaced persons and migrants are a common focus in humanitarian responses. However disaster responders must often “fly blind” without the benefit of current, accurate information about the worst-affected populations. To better respond to the impacts of climate change as they unfold, we will need more rapid, cost-effective, and accurate methods for identifying patterns of displacement and migration.