与此相似，湿地的丧失也威胁到了新奥尔良的大坝，因为建坝的基础是认定城市和墨西哥湾之间存在着40到50英里保护性沼泽的水面缓冲。
Similarly, loss of wetlands threatened New Orleans’ levees, which were built on the assumption that they would have 40 to 50 miles of protective swamp as buffer between the city and the Gulf of Mexico.