Workers harvest soybeans in Nova Mutum, Mato Grosso state in western Brazil, in this February 29, 2008 file photo. Recent floods and droughts may be harbingers of a troubled future for Brazilian farmers, who worry that climate change could severely disrupt production in one of the world's breadbaskets. Picture taken February 29, 2008. To match feature BRAZIL-CLIMATE/ REUTERS/Paulo Whitaker/Files (BRAZIL ENVIRONMENT DISASTER AGRICULTURE)
REUTERS/PAULO WHITAKER