Fracking Chemicals May Be Unknown

Fracking Chemicals May Be Unknown, Even To Gas Drillers, Lawsuit Documents Suggest

Critics of hydraulic fracturing, known widely as "fracking," have been pushing hard for natural gas companies to disclose all of the chemicals in the fluids that are used in the process. But what if the companies themselves don't even know what those chemicals are?

http://www.huffingtonpost.com/2013/09/27/fracking-chemicals_n_3998319.html