Sure but...
The gaz released near to the groundwater has the right conditions to get in the water.
All these people use their own well to the groundwater.
Many farmers use the groundwater directly on the crops.
About the way they get the gaz : They inject a cement that will make the perfect tube to get the main part of the gaz back, but holes in the structure allow the gaz to escape to the environment, and it's only effective after a delay implied by the drying of the cement, which mean a part is lost in the underground.
(, Tue 10 May 2011, 21:36, Reply)