Colorado Governor John Hickenlooper told oil and gas companies on Tuesday to expect heavier regulations on fracking fluid in the state by the end of the year. Speaking at the Colorado Oil and Gas Association conference, Hickenlooper said disclosing the contents of the fluid would bolster public trust in the industry, reports the Denver Post.

Fracking fluid is used to displace oil and gas from formations deep underground. Critics contend the fluid contains carcinogens which pollute groundwater. Industry officials, meanwhile, insist the practice is safe but are unwilling to divulge the components of their fluids.

For Breaking Energy coverage of former Colorado Governor Bill Ritter’s work on renewable energy, see: Five Things You Must Know.

Hickenlooper, a former geologist, acknowledged the need to protect trade secrets, but also made the point that, “the most valuable recipe in the world is for Coca Cola and they put it on the bottle.”

For the full story on the Huffington Post go here. For the full story from the Denver Post go here.