Venezuela turmoil fueling energy commodities boom
Vale to use increased free cash flow to reduce debt
Petrobras sees refinery sale generating market changes
Unasur collapse underscores regional divisions

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Shell sells Argentine downstream assets to Raízen
Yara's first quarter profits drop
Disgraced Odebrecht to fight Mexico sanctions
Petrobras seeks partnerships in divestment drive
Will political turmoil stymie Brazil's oil sector recovery?
Chile approves Arbiodo iodine project