What to pay attention to as the California fracking debate heats up

KQED: Last week, California issued draft regulations for fracking, or hydraulic fracturing, an increasingly popular but controversial method of oil and natural gas retrieval. How does fracking work? KQED Science's Lauren Sommer explains: Millions of gallons of water, mixed with sand and chemicals, are injected underground at high pressure. That cracks the rocks, letting the oil out. Around the country, hydraulic fracturing has led to record levels of oil and gas production. Workers change the pipes......

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