At a Senate Foreign Relations Committee hearing [on Tuesday], a Department of Defense representative laid out how climate change is exposing its infrastructure in coastal and Arctic regions to rising sea levels and extreme weather, and that it's even impacting decisions like which types of weapons the Pentagon buys. This is only the latest in a series of recent warnings from the military, which raised the issue as far back as George W. Bush's second term. In March, the Pentagon warned, in its Quadrennial Defense Review, that the effects of climate change "are threat multipliers that will aggravate stressors abroad such as poverty, environmental degradation, political instability, and social tensions -- conditions that can enable terrorist activity and other forms of violence." In other words, increased drought and water shortages are likely to trigger fighting over limited resources.
The accelerating rate of climate change poses a severe risk to national security and acts as a catalyst for global political conflict, a report published Tuesday by a leading government-funded military research organization concluded. The CNA Corporation Military Advisory Board found that climate change-induced drought in the Middle East and Africa is leading to conflicts over food and water and escalating longstanding regional and ethnic tensions into violent clashes. The report also found that rising sea levels are putting people and food supplies in vulnerable coastal regions like eastern India, Bangladesh and the Mekong Delta in Vietnam at risk and could lead to a new wave of refugees.