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GGRA03H3 (139)
Lecture 8

lecture 8

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Andre Sorensen

Topic Urban Ecosystems pollutionUrban ecosystem analysis Water pollution managementPoint and nonpoint sourcesRain as pollutionAir pollutionPoint source non point source New toxins Asthma and children Final exam format study tips Urban Ecosystems During the last 15 years new understanding 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 It is critical to understand the nature of the inputs and outputsWater inputs and outputs Water is one of the most important urban inputs Ensuring quality water supply is important for healthPolluted water is one of main urban outputs thOne ofthe key achievements of the 19 century sanitary revolution was the development of public water supply and wastewater removal infrastructure Initially just pipes to dump the water downstream later primary treatment secondary treatment 50 and 60s water system put bacteria to clean water and filter nondissolvebiological wastetertiary treatment systems were added deal with toxic Current water challenges
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