NATO's Climate Agenda: A Transformation in Security Thinking or an Institutional Contradiction?
NATO summits are typically dominated by discussions on defence spending, military capabilities and deterrence against Russia. Yet a quieter transformation has been unfolding within the Alliance's official documents. Climate change is no longer treated as a peripheral environmental issue but as a strategic variable that directly affects military readiness, operational effectiveness and collective defence.
This does not mean that NATO is becoming an environmental organisation. Rather, it suggests that the Alliance has begun to define security not only by the capabilities of potential adversaries but also by the changing physical conditions under which military operations are conducted. At the same time, NATO's climate agenda reveals an important contradiction. While the Alliance is adapting its military planning to the consequences of climate change, it has yet to fully measure the carbon costs of expanding military activities.
Why Has Climate Become a NATO Issue?
NATO's institutional transformation became more visible with the adoption of the Climate Change and Security Action Plan in 2021. The Action Plan requires regular assessments of the impact of climate change on NATO's strategic environment, military installations, operations and capabilities. This shift was reinforced by the 2022 Strategic Concept, which identified climate change as a "threat multiplier" with profound implications for international security. As a result, climate change moved beyond the realm of environmental cooperation and became closely linked to deterrence, resilience and military preparedness.
The rationale behind this shift is fundamentally operational. Climate change is not regarded as a conventional military threat. No state will attack NATO because of climate change. Instead, climate change intensifies existing security risks and complicates military operations. Heatwaves reduce personnel performance and limit training activities. Floods, storms and wildfires threaten military bases, ports, transport corridors and energy infrastructure. NATO's 2023 assessment concluded that increasingly frequent extreme weather events place growing pressure on military equipment, reduce operational availability and increase maintenance costs. The Alliance's 2024 assessment similarly examines climate-related risks across NATO's assets, infrastructure, missions, operations and civil preparedness.
The Arctic illustrates this transformation particularly well. Declining sea ice is turning what was once a natural strategic barrier into a more accessible region for maritime transport, resource extraction and military activity. Climate change is not creating new geopolitical competitors. Rather, it is changing the geographical conditions that enable strategic competition among existing actors, particularly Russia and China. Consequently, NATO is adapting not only to evolving threats but also to a rapidly changing operational environment.
This does not mean that NATO is becoming an environmental organisation. Rather, it suggests that the Alliance has begun to define security not only by the capabilities of potential adversaries but also by the changing physical conditions under which military operations are conducted. At the same time, NATO's climate agenda reveals an important contradiction. While the Alliance is adapting its military planning to the consequences of climate change, it has yet to fully measure the carbon costs of expanding military activities.
Why Has Climate Become a NATO Issue?
NATO's institutional transformation became more visible with the adoption of the Climate Change and Security Action Plan in 2021. The Action Plan requires regular assessments of the impact of climate change on NATO's strategic environment, military installations, operations and capabilities. This shift was reinforced by the 2022 Strategic Concept, which identified climate change as a "threat multiplier" with profound implications for international security. As a result, climate change moved beyond the realm of environmental cooperation and became closely linked to deterrence, resilience and military preparedness.
The rationale behind this shift is fundamentally operational. Climate change is not regarded as a conventional military threat. No state will attack NATO because of climate change. Instead, climate change intensifies existing security risks and complicates military operations. Heatwaves reduce personnel performance and limit training activities. Floods, storms and wildfires threaten military bases, ports, transport corridors and energy infrastructure. NATO's 2023 assessment concluded that increasingly frequent extreme weather events place growing pressure on military equipment, reduce operational availability and increase maintenance costs. The Alliance's 2024 assessment similarly examines climate-related risks across NATO's assets, infrastructure, missions, operations and civil preparedness.
The Arctic illustrates this transformation particularly well. Declining sea ice is turning what was once a natural strategic barrier into a more accessible region for maritime transport, resource extraction and military activity. Climate change is not creating new geopolitical competitors. Rather, it is changing the geographical conditions that enable strategic competition among existing actors, particularly Russia and China. Consequently, NATO is adapting not only to evolving threats but also to a rapidly changing operational environment.
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