Brazil's environmental authority has approved one of the final requirements for state-run oil company Petrobras to proceed with oil exploration at the mouth of the Amazon River.

Brazil's environmental authority has approved one of the final requirements for state-run oil company Petrobras to proceed with oil exploration at the mouth of the Amazon River.

RIO DE JANEIRO (Reuters) -Petrobras aims to make Africa its main region of development outside Brazil, the state-run oil firm's CEO said on Thursday, adding that Ivory Coast has…