Who's sinking Venice?

This map shows exactly which parts of Venice are falling into the water the fastest, and which ones are holding up--suggesting the who, what and where of blame and praise. Betsy Mason, at Wired, reports on what satellite imaging reveals about the sinking city:

They conclude that the average background sinking is around 1 millimeter per year. The more acute man-made sinking ranged up to 10 millimeters a year (shown in red on the map above on the first slide), but in some places human activity actually reduces the natural sinking (shown in green).