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Now Playing: 02-28-12 Marketplace Morning Report

Online user review site Yelp is getting ready for its IPO. The Environmental Protection Agency is in court to defend its landmark global warming finding. A new study reveals the wealthy may be the least ethical. The number of "supercommuters" is on the rise. And the Wealth & Poverty Desk takes a look at poverty, revealing that many who are technically living above the poverty line in the U.S. actually canā€™t afford to pay for basic needs like clothing and food.

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