Sadad, A., Zulkarnaini, Z., Nasution, M.S. and Mayarni, M. 2024. Environmental Pollution and Threats to the Future of Sustainable Ecotourism: Challenges and Solutions in Riau Province. Jurnal Riset Teknologi Pencegahan Pencemaran Industri. 15, 2 (Nov. 2024), 87–93. DOI:https://doi.org/10.21771/jrtppi.2024.v15.no2.p87-93.