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EESA07H3 (45)
Lecture 10

Lecture 10

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Environmental Science
Tanzina Mohsin

Lecture 10: Urban Areas Facts on Urban Areas 3 billion people (half of worlds population) live in urban areas Over 1 billion urban dwellers (13) lack access to safe drinking water Over 2 billion (23) lack adequate sanitation In 1950 there were <100 cities with population of over 1 million By 2025 it is projected that the number of cities with population over 1 million will be...650 Megacities o Southeast Asia- developing countries where it is hard to control population growth Within 25 years, worlds population is expected to exceed 8 billion and by 2050 it is projected to approach 10 billion or more Most of these additional people will live in cities and will place an enormous burden on existing water supplies A major challenge will be to keep cities healthy and sustainable In turn, healthy, sustainable cities demand sustainable water supplies for adequate sanitation and safe drinking water Important resource management decisions will need to be made, and ground water, the worlds largest reserve of fresh water is key to resolving this serious resource issue In developing countries they have scare underground water supplies o Rural areas depend on ground water Water management and resources, water and megacities o Link all knowledge with course materials, readings and dvds Urban Areas: where is all the water? Groundwater, mostly from shallow private wells, played key role in birt
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