“50 years ago, 20 million young people protested about the damage to our Earth. Over the past 5 decades, a lot has happened. Our ozone layer is healing, renewable energy is booming worldwide, environmental awareness has never been higher. But some risks are even more acute than before,” said Denis Hayes, coordinator of the first Earth Day and founder of Earth Day Network, in a video message at a recent Wilson Center event commemorating the 50th Earth Day. 

Beginning with the end of the Cold War, a relatively small but growing number of scholars began to investigate the connections between environmental change, conflict, peace, and changing notions of security. The recognition of these linkages wasn’t new, but as the heavy weight of superpower confrontation lifted and new foreign policy dynamics unfolded across the globe, an expanded range of research questions and tools emerged.

Pakistan ranks eighth on the list of countries most affected by extreme weather events (1998–2017 data), according to the 2019 Global Risk Index. With increasing global temperatures, severe weather and water events, like monsoons and droughts, are likely to become even more frequent and extreme in the future. Since the 1960s, Pakistan has observed changes in temperature and precipitation. By the end of the century, Pakistan’s temperatures are expected to be significantly higher than the global average.

For two weeks, Hurricane Dorian, one of the strongest hurricanes to make landfall in the Pacific, decimated large swaths of the Caribbean displacing 70,000 people and killing at least 50. Natural disasters like Hurricane Dorian in the Caribbean have only been worsening over the last decade, a trend often attributed to warming oceanic and atmospheric temperatures.

In the Peruvian Andes, where cropland is irrigated and water availability is variable at best, knowledge of highland hydrology is crucial to survival. However, until recently, the locals did not have adequate information to be able to use their water efficiently. So the community worked with a nonprofit to develop a non-specialist/non-researcher run data-gathering project to monitor the water in the region to optimize its use: in short, they developed a citizen science project.

The Horn of Africa faces critical security and climate risks. Persistent droughts have precipitated the onset of food insecurity and waterborne disease, while heavy rain events such as Cyclone Sagar have caused widespread flooding, mudslides, and wind damage. These challenges are increasing in severity against a backdrop of changing demographic trends—including rapid population growth, increased migration, and urbanization—and power struggles both within and between countries in the region.  

Evidence that extreme weather, water, and climate events pose critical security risks to the U.S. homeland, national security, and global stability has been mounting in recent years. From destabilizing droughts in Africa to devastating hurricanes and flooding in the United States, we are clearly seeing an increase in not only the frequency and severity of these events, but also their physical, social, and economic impacts.

The Arctic is changing, and it’s changing fast, even faster than models had predicted. The most recent Intergovernmental Panel on Climate Change (IPCC) report found with strong confidence that the Arctic is warming two to three times faster than the global average.