The massive economic crisis in Argentina has had an unexpected silver lining for the environment: It has led to a surge in the use of compressed natural gas (CNG) in cars, a cleaner fuel than either diesel or gasoline. Argentina is home to the third-largest natural-gas reserves in Latin America and the world's largest fleet of natural-gas cars, at about 800,000, or 15 percent of personal vehicles. After the peso was devalued in January 2002, gasoline and diesel prices jumped by more than 30 percent, making CNG the most economical fuel available. "There's a revolution going on in the energy …
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