Nova classe média brasileira em perigo

(Reuters) - They were the big winners in Brazil's economic boom: nearly 40 million people who joined the middle class since 2003 and went on a shopping spree, many of them buying televisions, cars or air conditioners for the first time. 
Yet there are signs that some of these Brazilians -- known here as the "new C Class" -- are in danger of sliding back into poverty...
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