Other important sectors include the petrochemical sector, with three plants located in the suburbs of San Lorenzo and Port San Martin; the chemistry sector, with plants for sulphuric acid, fertilizers, resins and other products; the cellulose industry; the meat industry; ironworks; auto parts; the plants and equipment for bottled oil; agricultural machinery; and the materials and equipment for the construction industry. Worldwide international companies settled in Rosario include, among others, General Motors , Cargill , Unilever , John Deere , Petrobrás , ICI , Dow , Tenneco and Mahle .
Related to tamale , hallacas , and guanimes , pasteles are believed to have been made by natives of Boriquen(Puerto Rico). Tainos made masa from cassava and squash. The masa was then filled with beans, corn, nuts, meat (Iguana, frogs or birds), fish and wrapped in corn husk. The pastel has also African roots. The African slaves incorporated the use of plantains, bananas and other root vegetables into the pasteles recipe. Puerto Rico has turned pasteles making into an art having hundreds of recipes and an annual pastel festival (Festival Nacional del Pastel Puertorriqueño)  on the island.