They are probably referring to the know issue of tremors caused by natural gas extraction. For example: https://www.nytimes.com/2019/10/24/business/energy-envi

They are probably referring to the know issue of tremors caused by natural gas extraction. For example: https://www.nytimes.com/2019/10/24/business/energy-environment/netherlands-gas-earthquakes.html https://www.nytimes.com/2019/10/24/business/energy-environme...