This article was adapted from Stephanie Speck’s remarks at the 2025 Berlin Climate Security Conference.

When I arrived in Mogadishu in 2013 to set up and lead the Office of the President’s communication and media department, I had the privilege of being invited to breakfast with the President. As I made my way through the layers of security leading to the presidential residence, I noticed an older woman walking behind me—cradling a chicken under each arm. She followed closely, undeterred by the checkpoints that stopped others.

A massive flood in Somalia killed hundreds of people, and displaced tens of thousands more. Yet the survivors faced a vexing prospect when they tried to return home: Al-Shabab had moved in.  

Stephanie Speck, Head of Special Initiatives at the Green Climate Fund, observed at a recent Stimson Center event that Shabab’s new levies meant that residents could not to move back to farm their land.  

When we look at climate-related insecurity, it’s usually in the context of poorer parts of the planet. And there’s generally good reason for that focus. Regions such as the Sahel and the Middle East are where the most––and worst––conflict of this nature plays out. And, for the most part, poorer countries are also the places least equipped to manage climate impacts and their effects on stability.

A window into what we’re reading in the Stimson Center’s Environmental Security Program 

Assessment of UNESCO Sites Reveals Climate Impacts (Mongabay)  

Initial data from the first ever global biodiversity and climate assessment indicates that 98% of UNESCO’s 2,200+ World Heritage Sites, Biosphere Reserves, and Geoparks have experienced at least one climate-related extreme event since 2000, including massive wildfires, droughts, and retreating glaciers. The effort to track such effects will now be augmented by UNESCO’s new Sites Navigator, a geospatial platform that integrates over 40 datasets to track climate impacts, biodiversity loss, and socioeconomic conditions in real time. 

A window into what we’re reading in the Stimson Center’s Environmental Security Program

Mexico’s Mercury Boom is Poisoning People and the Environment (Associated Press)

In Mexico’s Sierra Gorda mountains, soaring international gold prices also have created a mercury boom. Since 2011, mercury prices have skyrocketed from $20 per kilogram to between $240 and $350 per kilogram today. Most of Mexico’s mercury is trafficked to Colombia, Bolivia, and Peru for use in illegal Amazon gold mining operations that contaminate rivers and ecosystems. Yet the country’s adoption of a 2017 UN convention banning mercury mining and exports also allows artisanal mines to operate until 2032.

While the devastating cyclones Dineo (2017) and Idai (2019) may feel like distant memories on the global stage, their impact remains etched into daily life in Zimbabwe’s Tsholotsho and Chimanimani districts. A punishing regional drought in 2024 makes the picture here even clearer: food, land, and water systems have been reshaped in ways that directly influence social cohesion and stability.

Climate-related catastrophes are posing significant challenges in already-fragile South Sudan. When record-breaking floods again swept across the country in mid-2024, for instance, the disaster affected 1.4 million people, with the cumulative years of flooding submerging two-thirds of the country.

A window into what we’re reading at the Stimson Center’s Environmental Security Program

A Water Security Crisis Grips Pakistan’s Indus Delta (Al-Jazeera)

The Indus delta in Pakistan is experiencing severe environmental collapse as seawater intrusion makes farming and fishing impossible. Salinity levels have risen 70% since 1990, forcing tens of thousands from coastal districts. Over 1.2 million people from the broader delta region have abandoned their homes in the past two decades. The construction of irrigation canals and hydropower dams, compounded by the impacts of climate change on glacial melt, has accelerated the crisis and reduced downstream flow by 80% since the 1950s. More than 16% of fertile Indus delta land has become unproductive, as salt crusts cover the ground and boats must transport drinking water to the region’s remaining villages.