What will the sinking of Venice mean to the world?

"Venice has become a museum city, no longer a residential one," said a Unesco director recently about the city threatened by rising sea levels. Jack Watkins of The Independent discusses the fate of the city.

For centuries, residents of the city have feared the lagoon upon which it is built, a fear multiplied lately by reports of effects of Global Warming. Now officials are hoping to fight back, financed, in part, by tariffs on tourists, leading one to ask: How much is Venice worth to you?