[1/2] A logo of Brazil's state-run Petrobras oil company is seen at its headquarters in Rio de Janeiro, Brazil October 16, 2019. REUTERS/Sergio MoraesSAO PAULO, May 18 (Reuters) - A decision by Brazil's environmental regulator to block state-owned oil company Petrobras' Amazon oil project has exposed tensions in President Luiz Inacio Lula da Silva's coalition between green advocates and those prioritizing economic development. Ibama, late on Wednesday, said it would block a request by state-run oil giant Petrobras (PETR4.SA) to drill at the Amazon mouth near Amapá, in a much-awaited decision that followed a technical recommendation by Ibama experts to reject the project. The decision by Ibama, which is overseen by Lula's environment minister, the globally recognized environmentalist Marina Silva, has riled some within the governing coalition. "We'll fight against this decision," Rodrigues wrote on Twitter, adding that "the people of Amapa want to have the right to be heard".

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