the mainin is when t ty leak out of the sideses of f the shaft io the water table through cracked cases. also, the chemicals are mixed and sofas and stored in a large pond and a must be insulated from the college which is sometimes not done. once it is drilled and producuction, it can stillll be ininvisibly polluted. as much as s 9% of the methane d out of theay leak well.. most shale basins are even flat and maintain a fairly regular deep layer with you a hard rock contractions that would allow water to move upward. dog did from the university of the free state supported natural gas extraction until he embarked on instead of the geology of the desert. he fears that political pathways made by lava flows will allllow fracking fluluids and other ways to rise anand pollute t the watr table. and that goese lovove - goes set went to iraq, to the rock. our problem is 10 times, 100 times bigger.. you don't find these in the u.s.. >> the product is undnder such presessure thahat is alwayss log for these e preferrered slow pa. itit is believed in it will find his way up the gas wells. >>>> whaha