Worldwide, over 150 million people would find themselves underwater by the year 2070 should scenarios about global warming play out. This includes 130 important port cities, such as New York City, Tokyo, Hong Kong, Mumbai, and Bangkok. A 2007 estimate said that this would have an economic impact of $35 trillion dollars, an amount no nation is currently equipped to surmount. Not only would such a flood destroy coastal cities, but mass migrations would occur, causing political and social unrest that many believe would inevitably lead to military conflicts, famines, and disease.