(Bloomberg) -- President Luiz Inacio Lula da Silva’s government is moving toward allowing Brazil’s state-run oil company to survey an ecologically sensitive offshore region, a decision that threatens to overshadow a major environmental summit and feed a festering dispute in his administration.Most Read from BloombergEveryone Wants to Work at UPS After Teamsters DealFirst American City to Tame Inflation Owes Its Success to Affordable HousingTycoon Who Gave Away $750 Million Sees Profit in Loans t