Most intersting are also some "attachmets" at the end of the document. They give an outlook on the environmental impact, or at least, the difficulties combined with oil- and gas drilling, especially the waste water problem.
These is also some "ADs" from companies, who claim to be able to reduce waste water problems. Some of these technologies might work out, but scientifically what they claim, has to be evaluated by the companies, which use these products. Considerably doubt should be useful.
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