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In page Rio de Janeiro:

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In the petrochemical sector, there are more than 700 companies, including Brazil's largest (Shell, Esso, Ipiranga, Chevron, PRIO, Repsol). Most maintain research centers throughout the state and together produce over four-fifths of the petroleum and fuels distributed at service stations nationwide.[citation needed] The Companhia Siderúrgica Nacional (CSN),[2] Ternium Brasil[3] (the largest steel mill in Latin America[4]) and the Brazilian branch of BHP Billiton[5] play significant roles in the mining sector. The city also hosts the main national and international groups of the shipbuilding industry and the largest shipyards in the state and throughout Brazil, which produce about 90% of the ships and offshore equipment in Brazil.[6]