Scientific evidence indicates recent global climate trends which if remain unchanged or develop further could result in abrupt climate change. Abrupt climate change could result in serious environmental and social impacts. The most serious environmental impact would be the disruption of the natural processes which sustain, feed, and fuel people and nations. The disruption of these natural ecosystem processes could result in the scarcity and/or inaccessibility of vital natural resources like water, food, and energy supplies. Scarcity and/or inaccessibility of vital natural resources could create social and political turmoil and adversely impact regional stability and homeland security. As the US is the largest historical producer of carbon dioxide, the most prevalent of the greenhouse gases, it should reform and adopt policies to adapt to the effects and/or mitigate the onset of abrupt climate change. Failure to take action will leave the US vulnerable to the environmental, social, and political impacts of abrupt climate change and threaten national security and vital US interests.
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