"Climate change: Variations in average weather conditions that persist over multiple decades or longer that encompass increases and decreases in temperature, shifts in precipitation, and changing risk of certain types of severe weather events.” DODD 4715.21
Climate Security is “the effects of climate change on U.S. national security and related infrastructure, on political stability at national and sub-national levels, on the security of allies and partners, and on ongoing or potential political violence and unrest.” (NDAA 2020)