GEOG 106 Lecture Notes - Lecture 12: Furan, Walleye, International Joint Commission
Document Summary
Great lakes hold 18% of the world"s surface freshwater. Toxic chemicals are down and bird population are rebounding. Lake erie, once called dead , is now home to the world"s largest walleye fishery. Critical pollutants eg) ddt and dde insecticide. Over 360 chemical compounds have been identified in the great lakes. Many are persistent toxic chemical (it won"t break down) Potentially dangerous to humans and already destructive to the aquatic ecosystems. One should not undertake a new action until the ramifications of that action are well understood. If our logical or reason tells this is dangerous or potentially dangerous cost effective measure should be taken. Source of pollution: point sources of water pollution. It comes from discrete facilities or location usually from single outflow pipes: non-point source s of water pollution. It is originated form numerous source spread over large areas eg) runoff from streets, residential neighborhoods, lawns, farms.
