The controversial drilling technique known as hydraulic fracturing has created an oil and gas boom around the country. In states like Texas, Pennsylvania and Colorado, there's been heated debate about rules that protect groundwater and public health.
California is now wading into that arena with the release of the state's first fracking regulations. The state's earthquake-prone geology, however, could bring particular concerns.
Fracking itself isn't new. The technology behind it, though, has changed.