The waters of Lake Chad sustain 70 million people in four countries. Beginning in the 1970s, the 25,000-square-kilometer lake began shrinking due to excessive drawdown for agriculture and mining. Now only 10 percent remains. The dwindling water supply devastated food production and fostered massive economic and political tensions. Many experts credit the worsening conditions for contributing to the rise of Boko Haram, an extremist group that has killed 20,000 people and forced 2.3 million more to flee.

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.

Over the past decade, the number of undernourished people around the world has declined by around 167 million, to just under 800 million people. However, this positive trend glosses over a stark reality: Food insecurity is increasing in the world’s mountains. This pattern has been under-recognized by development experts and governments, a dangerous oversight with far-reaching social and environmental repercussions.

How will climate change affect you? Probably through water.

That’s the major message of a new World Bank report that finds the ways governments treat water can have a profound effect on the economy.

The Middle East, as much as ever, is the focus of international attention, but the obvious crises may be a distraction from deeper underlying issues.

Just a few years ago, progress on global family planning and reproductive health policy seemed to be stuck in a rut. “For 20 years, development money for health had been directed to fight HIV and poverty, and as a result, momentum, interest, and funding for family planning had dwindled,” said Susan Rich, vice president of global partnerships for the Population Reference Bureau (PRB), at the Wilson Center on July 15. “Unmet need for family planning was high all over the world, but especially in Africa.” [Video Below]

Millions of people across the Middle East face drought, scarce drinking water supplies, and poor sanitation due to civil wars and conflict. Meanwhile, resource constraints and foreign military interventions risk more severe humanitarian disasters.

Hundreds of Yemenis have been killed since Houthi rebels overthrew President Abdu Rabu Mansour Hadi at the beginning of April. The instability next door has led Saudi Arabia to intervene with a bombing campaign and, most recently, impose a blockade of Yemen’s port cities to cut off what they claim is Iranian resupply of rebels. Besides blocking weapons though, the blockade is also having a major impact on food security and food assistance, and is even affecting livelihoods in Somalia.