I am not like your nutswinger beat91tsi or whatever his name is…If you haven’t been in your ‘field’ long enough to read up about it, feel free:
Extraction of natural gas
If natural gas is extracted from a natural gas field the initial pressure (up to 600 bar) in the field will drop over the years. The gas pressure also supports the soil layers above the field. If the pressure drops, the soil pressure increases and this leads to subsidence at the ground level. Since exploration of the Slochteren (Netherlands) gas field started in the late 1960s the ground level over a 250 km² area has dropped with a current maximum of 30 cm [3]. See also this subsidence lecture.
This type of subsidence can similarly be caused by extraction of other resources, e.g. ground water, petroleum or rock salt.