trees in the basie the mentoring mazing the basin is these producer compaction lost the sight of the rooms and along the wording of the land surface right now we call it subsidence land subsidence. as a result of this learn subsidence venice subsided by 14 centimeters in nearly 30 years. after a disastrous flood and $966.00 the practice of pumping up the groundwater was discontinued. but the damage to the city is in preferable to last 14 centimeters can never be regained global warming and rising sea levels are increasing the threat and they've already seen the water rise by a further 10 centimeters. in all the water is now $24.00 centimeters higher up on the buildings than at the time they were built and that. left visible traces.