By now you've probably heard the term fracking, short for hydraulic fracturing. It's the process where oil companies shoot a high-powered mix of water, sand and chemicals into the ground to break up oil and gas deposits.
Fracking has been going on for decades, but here in Southern California, we don't really know a lot of about where and when its taking place. Or what kind of chemicals are being used in the process. But the state is considering new guidelines change that.
KPCC's Environment Reporter Molly Peterson is here to fill us in.