Stacking efficiency of terrestrial Plant-Microbial Fuel Cells growing Ocimum basilicum and Origanum vulgareKristopher Ray S. Pamintuan, Arnie Jantzen G. Ancheta and Shaina Marie T. RoblesE3S Web Conf., 181 (2020) 01004DOI: https://doi.org/10.1051/e3sconf/202018101004