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By Mary Carroll, Contributing Reporter

RIO DE JANEIRO, BRAZIL – The arrival of the Rio+20 Earth Summit, for Brazil, is not only about the global sustainability progress that will be made. The international community is also closely watching to see how Rio will handle the management of such a large event, one of many now on the city's agenda in the coming years, most notably the 2014 World Cup and 2016 Olympic Games.

There has already been some controversy surrounding the . . .

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