Archive · 25 Oct 2025
Climate Change's Threat to National Security
Climate change is making the world a more dangerous place.
Rising temperatures can lead to more violence between people and groups because of resource loss and climate refugees.
Extreme weather events and changing climates can cause crop failures, water shortages, and food shortages.
The US government recognizes the national security threats posed by climate change but has also shown actions that contradict this, like cutting funding for climate science.
Failing to recognize climate change makes the U.S. less prepared for the challenges ahead.
Climate change is increasing global instability and national security risks.
Increased temperatures can lead to a rise in violence and conflict.
Climate change can cause resource scarcity, water shortages, and food insecurity.
The U.S. faces threats from conflict, disease, and the ability of the military to operate effectively.
The US government has varied in its acknowledgment and response to the national security threats of climate change.
- Who
- U.S. and other countries.
- What
- Climate change poses risks to national security.
- When
- Since at least 1991.
- Where
- Globally, with specific implications for the U.S.
- Why
- Climate change increases instability due to resource loss and extreme weather, exacerbating tensions and conflicts.
Acknowledging the Threat
Denying the Threat
Government Response
Acknowledging the Threat
Emphasizes the critical national security risks posed by climate change, focusing on innovation and clean energy.
Denying the Threat
May deny the threat and curtail programs related to the environment or aid, withdrawing from climate agreements.
- Temperature Increase Impact
- 1 degree Celsius increase: 2% rise in interpersonal violence; 2.5-5% rise in intergroup conflict.
- US Government Acknowledgment
- First acknowledged by President George W. Bush in 1991.
- 2025 Annual Threat Assessment
- Climate change was noticeably absent in the US intelligence community's assessment.