Fracking Companies Have Been Getting Worse About Disclosing The Chemicals They Use

According to a new study published in the journal Energy Policy, fracking companies have become less forthcoming since 2013 about the chemicals used in their operations, citing “the use of proprietary compounds” as grounds for limiting their disclosure.
http://thinkprogress.org/climate/2015/11/25/3725778/fracking-chemicals-who-knows/