Rivers have shaped the Western Balkan Peninsula’s characteristic landscape and played an important role in its history. Following the violence of the Yugoslav secession wars in the 1990s and the creation of six new nations, the number of transboundary river basins doubled from 6 to 13. In Kosovo, where independence remains a question, the water sector is a microcosm of tensions between ethnic Serbs and Albanians. The challenge of water resource management exists not only over the province’s contested national boundaries with Serbia, but between divided ethnic groups within the territory.

“The time for talk is done; it is now the time for action,” says Inger Andersen, director general of the International Union for Conservation of Nature (IUCN), in an interview before the 2016 World Conservation Congress.

In June 2010, The New York Times published a front page story trumpeting a Pentagon announcement of roughly $1 trillion worth of mineral resources in Afghanistan. Officials said the discovery was “far beyond any previously known reserves and enough to fundamentally alter the Afghan economy and perhaps the Afghan war itself.” Then-President Hamid Karzai soon inflated the figure to $3 trillion and then again to $30 trillion, enough to transform the country into the “Saudi Arabia of lithium.”

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.

Near the corner of Broadwick and Lexington in London’s Soho neighborhood, a single spot on the ground has influenced more than 150 years of urban development. It’s the location of a water pump that in 1854 physician John Snow pinpointed as the source of contamination leading to a widespread outbreak of cholera in the neighborhood that killed more than 600 people.

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.

Most African states are more vulnerable and less prepared to address climate change challenges than the rest of the world. This observation is supported by a wide variety of sources, including the Climate Vulnerability Index and the Notre Dame Global Adaptation Index. And in fact Africans and their political leaders frequently observe that this crisis, manufactured in the developed world, disproportionately affects their continent. During a meeting of the African Union in 2007, Ugandan President Yoweri Museveni called climate change “an act of aggression” by the rich against the poor.

It might seem strange to say that the deep sea, the vast expanse of the world’s oceans beyond the continental shelf, is at risk of conflict and competition. After all, no one lives there, and as is often said, more is known about the surface of the moon than most parts of the ocean floor. But the fact is, even the cold, dark reaches of the ocean are no longer immune to resource competition between the world’s major powers.