Article: A new spin on power: the 7H turbine being built in GE's Greenville, S.C., gas turbine plant. Once completed, the turbine will travel to Southern California by land and sea, taking a trip through the Panama Canal.(TECH WATCH)

The construction of yet another emissions-belching turbine might not seem like cause for celebration. But like it or not, the world continues to run on fossil fuels-and General Electric's 7H turbine is a breakthrough in efficiency. Like its predecessor, the 7FA system, the 40-ft-long, 400,000-pound 7H runs on relatively clean-burning natural gas. But, it produces 50 percent more power than the 7FA--with even lower NOx and C[O.sub.2] emissions. The trick? ...

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