The controversial method known as "fracking" is done by injecting water and chemicals deep underground to release oil and natural gas trapped in rock. California oil companies have been fracking for decades, claiming it is safe. But environmental groups say fracking may pollute groundwater and set off earthquakes.
Despite these concerns, and as we reported earlier this year, fracking continues to go unregulated in California. However, Gov. Jerry Brown is proposing new regulations that would require oil companies to spell out where they plan to use fracking before they start. They'd also have to list the chemicals being used. Lawmakers will hold hearings on the rules early next year.