Drilling companies nationwide have been keeping the identities of many fracking chemicals a secret by simply stamping them "confidential business information," also known as "trade secrets." In Wyoming, regulators had long accepted these claims with little validation, and residents were left in the dark about the toxic chemicals being injected into the ground near their homes, schools, and water supplies. A recent settlement agreement in a lawsuit filed by public interest groups, including the Center for Effective Government, will change this practice.