Because we have enough pollution of our air and water around the world. Injecting unknown toxic chemicals into our earth with fresh clean drinking water and realeasing poisonous gas's to the air we breath without analyzing long term effects is reckless and irresponsible. The clean air and water act should apply to all gas and oil business's, companies, and corporations operating in the U.S. and reach out to other country's on this planet to do the same. Research why the process was exempted in the past and decide for yourself. The HBO documentary video "Gasland" & this youtube link http://www.youtube.com/watch?v=phCibwj396I is a good start.