It is well known that public health issues that affect the world’s most vulnerable populations – food insecurity, maternal and child health, water- and sanitation-related disease, and resource scarcity – are inextricably linked. Where these linkages are strongest, experience on the ground has shown that community-based integrated approaches to development provide more effective and sustainable solutions over vertical, sector-based programs. But so far, there are very few comprehensive evaluations providing strong quantitative evidence of this advantage.

Carbon offsets have fallen in and out of favor since they were established with the Kyoto Protocol in 1997. Critics say they allow wealthy organizations to placate consumers and claim their products are “green” without making any real, lasting changes. But, if the scheme works properly, some action is supposed to be taken somewhere, so what is it like at one of these credit-producing organizations?

It’s not often that a change in accounting rules could reduce the probability of war. But that’s exactly what happened at the U.S. Securities and Exchange Commission (SEC) last month.

In 1979, Egyptian President Anwar Sadat famously said that “the only matter that could take Egypt to war again is water.” Sadat’s message was clear: the Nile is a matter of national security for Egypt.

Indeed, Egypt relies on the Nile for 95 percent of its water. But it is not the only state with an interest in the world’s longest river. There are 11 states in the Nile River basin, which stretches from Africa’s Great Lakes region – Tanzania, Uganda, Kenya, Rwanda, Burundi, and the Democratic Republic of the Congo – to the Ethiopian and Eritrean highlands through South Sudan, Sudan, and Egypt to the Mediterranean Sea.

As part of the recently-concluded Rio+20 Conference on Sustainable Development, the UN High Commissioner for Refugees (UNHCR) presented a new report last week, titled Climate Change, Vulnerability, and Human Mobility: Perspectives of Refugees From the East and Horn of Africa. The report was created in order to “understand the extent to which refugees and IDPs (internally displaced persons) in the East and Horn of Africa have perceived, experienced, and responded to climatic events and trends in recent years.”

The pace of fertility decline in sub-Saharan Africa will be the single most important factor in whether the global population reaches the UN’s high projection of nearly 11 billion in 2050, or remains closer to the low projection of 8 billion. In recent years, the high projection has seemed more likely, as sub-Saharan Africa has been marked by stalled fertility declines and stagnant rates of contraceptive use. Survey results released over the past year showing dramatic increases in contraceptive use in Ethiopia, Malawi, and Rwanda therefore set demographers and the family planning community abuzz, signaling that concerted efforts to improve health services had paid off and fertility rates were on the decline. But in recent months, additional surveys from Mozambique, Uganda, and Zimbabwe have shown that those positive trends are not universal.

“We never thought we would end up having the same problems here as the people in the Niger Delta. But now I’m worried,” Henry Ford Mirima, a spokesman for Uganda’s Bunyoro kingdom, said last fall in Le Monde Diplomatique. The kingdom – which calls itself East Africa’s oldest – sits along Lake Albert, where over the past seven years British oil company Tullow Oil has discovered oil reserves big enough to produce an estimated 2.5 billion barrels.

Uganda’s population is the second youngest in the world, with half of the country younger than 15.7 years old (just older than Niger’s median age of 15.5 years). In the past 10 years, the country – about half the size of France in land area – has added 10 million people, growing from 24 to 34 million. That growth, paired with other factors like poor governance and long-standing insecurity, has made providing basic services a difficult task for a government that is one of Africa’s most aid-dependent.