GGR 107 lecutre 5 - GGR 107 Environment Food and People...

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1 GGR 107 Environment Food and People Lecture October 4th Food Webs and Our Ecological Footprint
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2 The Hydrological Cycle – an addendum HUMAN IMPACTS ON THE HYDROLOGICAL CYCLE OVER ABSTRACTION - surface water, groundwater IRRIGATION - salinisation POLLUTION - example - micro-organisms, minerals CLIMATE CHANGE - example
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3 The Hydrological Cycle – an addendum “Town residents allege contaminated water tied to cancer deaths” Globe and Mail , Wednesday October 3 rd , 2007
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4 The Hydrological Cycle – an addendum “Town residents allege contaminated water tied to cancer deaths” Globe and Mail , Wednesday October 3 rd , 2007 Shannon, Quebec. Adjacent to Valcartier military base Trichloroethylene – TCE , used on the base as an industrial solvent, carcinogenic Used groundwater from private wells
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5 The Hydrological Cycle – an addendum Floods across Africa made at least one million people homeless, Ghana and Uganda the worst affected . The torrential rains even fell on the desert nations of Mali , Mauritania and Niger.” The Economist , Sept. 22 nd , 2007
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6 Environmental Systems – final lecture We have examined energy flows through inanimate forms (sunlight, heat) and animate forms (through the food chain)
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7 Environmental Systems Inanimate energy
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Environmental Systems Animate Energy . Outstanding
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GGR 107 lecutre 5 - GGR 107 Environment Food and People...

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