Natural gas extraction causes some subsidence. This is because deep rock strata slowly settle by up to several tens of centimetres over a large area. According to our calculations, soil subsidence resulting from mining activities in the deep subsurface does not cause any damage above ground. Read more about subsidence due to mining activities on the NLOG website. In the Netherlands, salt is mainly extracted at depths of between 350 and 500 metres. This carries risks of subsidence. We closely monitor salt extraction and advise the Ministry of KGG on issuing permits for the exploration and extraction of salt and the safe closure of caverns. Read more about salt extraction on the NLOG website. In addition to TNO-AGE, the expertise groups Geomodelling and Applied Geosciences at TNO Geological Service Netherlands are also researching the causes of soil subsidence.