Why is Venice Italy Sinking?

The city of Venice itself lies upon millions of wooden columns pounded into a sedimentary island. It sinks approximately 7 centimetres every 100 years or so, and has for the last millennia up until the last century where it’s reported that the sinking process has become accelerated, over 3 times the previous recordings. Scientists speculate this sharp rise can be attributed to the ascending sea level caused by global warming.