The environmental impact of the Adaro aluminum plant project has sparked controversy, particularly regarding the high emissions caused by coal-fired electricity. Despite Indonesia's vast hydroelectric potential, long construction cycles have been a driving factor in favor of coal power. However, with the construction of the Mentarang hydroelectric power station, there is potential for a more environmentally friendly power supply for industrial areas in the future, which could have a positive impact on reducing the environmental burden of the Adaro aluminum plant project.