NEW YORK (CNNMoney.com) -- Oil companies and many lawmakers are pressing to open up more U.S. areas for drilling. But the industry is drilling on just a fraction of areas it already has access to. Of the 90 million offshore acres the industry has leases to, mostly in the Gulf of Mexico, it is estimated that upwards of 70 million are not producing oil, according to both Democrats and oil-industry sources. One Democrat staffer said if all these existing areas were being drilled, U.S. oil production could be boosted by nearly 5 million barrels a day, although the oil industry said that number is far too high and one government agency said it was impossible to estimate production. Recent proposals to open up offshore coastal areas near Florida and California, as well as Alaska's Arctic National Wildlife Refuge, might yield 2...
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