Analisis Kualitas Sungai Air Hitam Kota Pekanbaru Sebagai Rancangan Poster Ma…

ABSTRACT Environmental changes and human activities are one of the causes of water pollution in various ecosystems, one of which is the river ecosystem. Environmental changes and environmental pollution greatly influence river quality from biological, physical and chemical aspects. This research aims to determine the quality of the waters of the Air Hitam River in Pekanbaru City based on biol…