In a commencement speech at the U.S. Coast Guard Academy today, President Obama said “climate change constitutes a serious threat to global security, an immediate risk to our national security, and, make no mistake, it will impact how our military defends our country.”

Sub-Saharan Africa is often characterized as an outlier in terms of population dynamics and reproductive health. While women are having fewer children around the world, even prompting some places to begin worrying about aging populations, the demographic transition is proceeding more slowly in Africa. Fertility rates in North and Southern Africa have declined to around three children per woman, but the three other sub-regions of the continent – East, Central, and West Africa – retain much higher fertility, between five and six children per woman. Whether, and how quickly, fertility rates decline in these regions over the next few decades will in large part determine the peak of world population. These regions’ demographic trajectories also have important implications for health, governance, food security, economic development, land use, climate vulnerability, and even security.

Expectations for the upcoming UN climate change summit in Paris are higher than they’ve been in years. Experts expect it will be the best chance to achieve a binding, universal agreement to limit carbon emissions. But the conference is still not getting the attention it deserves from policymakers and the public, given the stakes – and not just for the environment but for the international system writ large, said Nick Mabey, founding director and chief executive of the UK-based environmental NGO E3G at the Wilson Center on February 12.

“Nigeria’s population is only two percent of the world population, but we contribute about 10 percent of the maternal mortality,” said Oladosu Ojengbede, professor and director of the University of Ibadan’s Center for Population and Reproductive Health. [Video Below]

Population projections undergird many important policy decisions, from the U.S. government’s Feed the Future program to the Sustainable Development Goals. But they’re not as straightforward as they appear. Demographers often base their estimates on complicated assumptions that aren’t obvious to the end user.

It is no longer news that Nigeria is a peculiar country, a nation with huge human and natural resources, and whose diversity of peoples and internal geographies is a blessing. Sadly, it is also not news that the country represents at least 10 percent of the global maternal mortality burden, with a currently estimated maternal mortality ratio (MMR) of 487 per 100,000 livebirths (as of 2011).

One in five African states produce hydrocarbons, and most of these are heavily dependent on oil and gas revenues to finance their governments and generate foreign exchange. Further, an emerging group of East African states are waiting on international oil companies to develop new oil and gas reserves. But Africa’s record using non-renewable oil and gas resources to trigger economic and social development is poor – and plummeting prices may portend more instability to come.

In an effort to revamp the time-intensive process of conducting household surveys to collect health data in developing countries, a new project is using mobile phones and rapid processing techniques to generate regular updates for a tranche of indicators previously only adjusted every three to five years.