Study on hydraulic fracking

A long-awaited fi­nal re­port by the Cali­for­nia Coun­cil on Sci­ence and Tech­no­logy has found hy­draul­ic frack­ing in Cali­for­nia uses a host of highly tox­ic chem­ic­als that have un­known ef­fects on drink­ing wa­ter sup­plies, wild­life and crops. Those factors re­main un­known be­cause state reg­u­lat­ory agen­cies don’t fully un­der­stand what oil com­pan­ies are do­ing, the state sci­ence pan­el warned.