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This study aims to determine the effectiveness of Environmental Education Learning Book (PLH) based on Local Potential of Tarakan city. The research method used in this research is classroom action research. Subjects in this study is a class A1 Department of Biology education FKIP University of Borneo Tarakan. The instruments used in this research are test and observation sheet. Analysis of test result data is done descriptively quantitative with percentage technique. The results showed thatdoi:10.31629/ph.v2i1.267 fatcat:ojlr6v3uhbdf5mfqdvnpq5zd6e