GGRA03H3 Lecture 8: Lecture Eight
Document Summary
During the last 15 years new understandings of cities as complex ecosystems. Cities are now seen as complex organisms with their own metabolic processes. They have huge inputs and outputs that are structured by metabolic processes of production, delivery, consumption and waste emission. Inputs and outputs can be measured and where necessary can be influenced by public policy. I t is critical to the understand the nature of inputs and outputs. To be able to reduce waste u need to know what is going on in a city- u cannot influence until u know what is happening. Need to understand nature of inputs and outputs. Water is one of the most important urban inputs. Ensuring quality water supply is important for health. Polluted water is one of the main urban outputs. One of the key achievements of 19 century sanitary revolution was the development of public water supply and waste water removal infrastructure.
