"As was documented in Josh Fox's excellent documentary Gasland, the chemicals injected into the ground pose serious health and environmental risks to drinking water, air quality, and wildlife. However, the full extent of the risk is not known, because the gas industry isn't required to disclose what chemicals are used, or in what quantities. If that complete lack of transparency sounds outrageous, it is. We have Dick Cheney to thank for the "Halliburton loophole," which exempts fracking companies from many of the disclosures normally required under the Safe Drinking Water Act."