Embedded Player Los Angeles, you might be surprised to learn, sits on top of the largest urban oil field in the country and has been the site of oil extraction for almost 150 years. Today, nearly 5,000 oil wells remain active in Los Angeles County alone, many operating in communities of color, often very close to homes, schools and hospitals. Latino USA visits a neighborhood in South Los Angeles, the epicenter of an anti-oil-drilling movement that is gaining momentum. We meet Nalleli Cobo, the 18-year-old who's working to shut down the oil industry, one well at a time.