Experts are coming to agreement that the only way to save Venice from flooding is to build large gates to keep high water out of Venice’s lagoon. “The nearly €3 billion ($3.4 billion) scheme will comprise about 80 hollow gates embedded in the seabed at the three inlets to Venice’s lagoon. When not needed, the gates will rest on the seabed, full of water. But when high tides threaten the city, compressed air will force water out of the gates. This will cause them to rise and act as a barrier to water trying to enter the lagoon. Will the gates justify their large cost?”