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When it announced that it would use ethanol in its racing fuel, NASCAR joined a wider trend in the United States. Jared C. Tilton/Getty Images for NASCAR hide caption

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Jared C. Tilton/Getty Images for NASCAR

In this file photo from 2001, a migrant child sits atop a pile of unrecyclable computer waste imported to Guiya, China, from other countries. Basal Action Network hide caption

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Basal Action Network

Shopper Monica Eaves, with her daughter, Sophia, 2, shops for holiday gifts at The Grove outdoor mall in Los Angeles on Tuesday. A strong start to the holiday season is raising confidence that the consumer is back and that 2011 could be a better year for the economy than expected. AP Photographer/AP hide caption

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AP Photographer/AP