War, killing, migration and social instability fueled by droughts, floods, storms, and other climate change-fueled weather events.
Example: Unusual and multi-year droughts are a factor behind the violence in Afghanistan, Syria and Kenya. The droughts in these countries have made it difficult or impossible for farmers to grow crops or raise livestock, and have made it difficult to survive in these areas. Increasingly, the U.S. Pentagon sees climate change as posing one of the most serious security threats as it is expected to cause increased violence abroad, an increase in the spread of infectious diseases and an increase in terrorism.