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Fracking's next move will be offshore, with undersea operations in the Gulf of Mexico and off the coasts of Brazil and Africa, according to this article. As on land, however, there are environmental concerns, particularly over the use of chemicals that may harm sea life. "It's the most challenging, harshest environment that we'll be working in," said Ron Dusterhoft, a Halliburton engineer. "You just can't afford hiccups."

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