money: "One of the president’s attempts to generate alarm stood out as particularly silly. In his parade of apocalyptic horribles that we will face or are facing as a result of global warming—a list that now includes the war in Syria—Obama remarked that, “It’s estimated that a further increase in sea level of just one foot by the end of this century could cost our nation $200 billion.” If the president is trying to scare people into action, he will have to do better than this. Federal expenditures for FY2014 were in the neighborhood of $3.5 trillion. That’s for one year of government spending. So let’s say that the president is lowballing the potential sea-level rise, and we can expect, say, a four foot increase in sea levels between now and 2100. (Every other warming-related apocalyptic prediction made over the last forty years has failed to come to pass, but work with me here.) Assuming a simple relationship between the rise in sea levels and the cost, that brings the expected damage up to $800 billion, which is still less than one-fourth of one year’s federal budget today. Spread out over 85 years."