Today, the Sahara Desert is a vast, nearly lifeless expanse of sand and rock. But ancient cave paintings tell of a time when it was fertile grassland and bands of human hunters chased aurochs and antelope.

Wildlife areas and parks are designed to preserve plant and animal life in biological hotspots, but what about the people who live nearby these hotspots? In many parts of East Africa, communities press right up against park boundaries and people have few alternatives but to draw on the natural resources of protected areas. Conservation efforts depend on these communities’ cooperation and the sustainability – both environmentally and economically – of their livelihoods. [Video Below]

Water is the foundation of human society and will become even more critical as population growth, development, and climate change put pressure on already-shrinking water resources in the years ahead. But will this scarcity fuel conflict between countries with shared waters, as some have predicted, or will it create more impetus for cooperation?

Environmental security and international development aren’t typical movie-going fare, but at the 2013 DC Environmental Film Festival, ECSP premiered two short documentaries with unique environmental stories: Healthy People, Healthy Environment: Integrated Development in Tanzania shows how improving health services and environmental conservation can empower coastal communities in Africa; and Transcending Boundaries: Perspectives from the Central Albertine Rift Transfrontier Protected Area Network explores the opportunities for “peace parks” along the shared borders of Uganda, Rwanda, and the Democratic Republic of Congo.

The original version of this article, by Nora Hawkins and Laura Johnson, appeared on State of the Planet.

As creators of the Environmental Performance Index (EPI), we are often asked if the EPI has measurable impacts on environmental decision-making. The short answer is yes; from promoting re-evaluation of air pollution policy in South Korea to inspiring the creation of seafood sustainability indicators in North America, the EPI has tangible influences on environmental actions throughout the world.

A well-known Chinese proverb describing the relationship between the central government in Beijing and its people says, “Heaven is high and the emperor is far away” (天高皇帝远, tian gao, huang di yuan). It’s not too far of a stretch to apply the same proverb to the current state of China’s environment sector, where relatively strong pollution control laws are poorly enforced on the ground.

While it can be convenient to think of human health and the environment as unrelated silos, they are in fact closely related. The United Nations Environment Program (UNEP) recently released a report underscoring this point especially for Africa, where large numbers of people are directly reliant on natural resources for their livelihoods.

Fifty years after independence, Uganda has one of the highest population growth rates in the world at 3.3 percent – a rate which puts the country on track to nearly double in population over the next two decades. More than 50 percent of the population is under the age of 18. This large youth cohort will ensure that the country continues to grow for decades to come, even if couples choose – and are able – to have smaller families. And according to the State of Uganda Population Report 2011, “with more than one million people added to the population every year, the quality of [health] service delivery will suffer.”