FILE - In this Sept. 15, 2009 file photo, cattle graze in an illegally deforested farm near Novo Progresso, in Brazil's northern state of Para. The Brazilian Amazon is arguably the world's biggest ... more 
FILE - In this Sept. 15, 2009 file photo, cattle graze in an illegally deforested farm near Novo Progresso, in Brazil's northern state of Para. The Brazilian Amazon is arguably the world's biggest natural defense against global warming, acting as a "sink," or absorber, of carbon dioxide. Brazilian legislators are pushing to resume debate Tuesday, May 24, 2011 on changes to an environmental law that watchdog groups warn will speed destruction of the Amazon rain forest. less 
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Associated Press | Photo By Andre Penner, file
Tue, May 24, 2011 10:05 AM EDT