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People protest beside a table set with empty plates and national flags as they hold signs that read from right to left in Portuguese; "Shame, hunger" at the Copacabana beach during the United Nations Conference on Sustainable Development, or Rio+20, in Rio de Janeiro, Brazil, Tuesday, June 19, 2012. The Earth summit runs through June 22. (AP Photo/Silvia Izquierdo)

Associated Press
People protest beside a table set with empty plates and national flags as they hold signs that read from right to left in Portuguese; "Shame, hunger" at the Copacabana beach during the United Nations Conference on Sustainable Development, or  Rio+20, in Rio de Janeiro, Brazil, Tuesday, June 19, 2012. The Earth summit runs through June 22. (AP Photo/Silvia Izquierdo)
People protest beside a table set with empty plates and national flags as they hold signs that read from right to left in Portuguese; "Shame, hunger" at the Copacabana beach during the United Nations Conference on Sustainable Development, or Rio+20, in Rio de Janeiro, Brazil, Tuesday, June 19, 2012. The Earth summit runs through June 22. (AP Photo/Silvia Izquierdo)
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