Only minimal amounts of untapped oil and gas resources remain in the historic Los Angeles fossil fuel production basin, according to the U.S. Geological Survey (USGS).

New estimates released by USGS on Wednesday indicate that just 61 million barrels of oil are technically recoverable in this region — equivalent to just 0.68 percent of the mammoth quantities already extracted.

As a basis of comparison, since exploration began in the area in the 1880s, 9 billion........

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