To save our great cities from catastrophic flooding, engineers are raising some of the biggest sea defenses in history. Venice MOSE Wall, Delta Flume, Japan Tsunami Barrier, New Jersey Storm Defense. 為了救這些超級城市於災難性的洪水之中，工程師在著手有史以來陣仗最大的沿海防洪項目——威尼斯莫斯牆，代爾夫特三角洲引水槽，日本防海嘯堤壩，新澤西州風暴防禦。
