This document discusses various types of pollution occurring in several Malaysian states and cities. It mentions river pollution affecting the Kinta River in Ipoh, Sungai Pinji in Ipoh, and the Klang River in Selangor. Air and noise pollution from limestone hills in Ipoh is also noted. The document closes by acknowledging river pollution of the Juru River in Penang and pollution from bauxite mining in Kuantan, Pahang.