article_snippet.sent: Since the 1930s, the oil and gas industry has been injecting various fluids underground, and since then, researchers have been attempting to understand the risks this poses to human safety.
article_snippet.sent: One of the main concerns over CCS is the pressure that CCS can exert on the porous rock deep underground.
article_snippet.sent: Because you’ve got a volume of air in there already, when you increase pressure you can crack rock.
article_snippet.sent: But Professor Haszeldine added that the oil and gas industry has the technologies to monitor this pressure and prevent subsurface cracks from appearing.
article_snippet.sent: ‘The other type of risk is there are geological faults underground, and if you increase the pressure, then that can lubricate that fault and create a small tremor on that fault,’ said Professor Haszeldine.
article_snippet.sent: If a tremor is large enough, a tremor is large enough could cause CO2 to leak back to the surface and into the atmosphere.