Since 2008, oil production in the United States has surged ... 28 percent as the controversial practice of fracking unlocks new supplies in North Dakota and Texas. At the same time, use of oil and petroleum products has fallen 4 percent, as Americans switch to more efficient cars. In theory at least, both of those factors should have pushed the price of crude down. Instead, it's gone up. Since bottoming out during the financial crisis, oil futures traded on the New York Mercantile Exchange have nearly tripled in value, climbing from $33.87 per barrel in December 2008 to roughly $95 this month. Oil still costs substantially more now than it did in 2007, before the recession began. The high price illustrates a brutal truth of today's interconnected world - oil is a global commodity, bought and sold in a global marketplace. Even while demand falls in the United States, it's growing in countries such as China and India. Critics say the price paradox undercuts the oil industry's efforts to drill in more of America's public lands and coastal waters. It really debunks the myth of 'Drill, baby, drill,' that if we just produce more oil, prices will stay low or go lower," said Michael Marx, director of the Sierra Club's Beyond Oil campaign. Will all that extra petroleum finally mean lower prices? "It's a difficult question to answer, because there's not a one-for-one (relationship) between an increase in production and a decrease in prices," said Doug MacIntyre, director of the Energy Information Administration's office of petroleum statistics. "There are so many other factors."