A brew of state activity, federal inaction, industry interests, and environmental concerns is bubbling over in response to public demands for more information about the chemicals used in hydraulic fracturing. Fueling the debate is the oil and gas industry’s refusal to reveal the identity of the substances in fracking fluids.
C&EN, March 16, 2015.
http://cen.acs.org/articles/93/i11/Uneven-State-Rules-Trade-Secrets.html