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    earth’s surface that has been formed by natural processes and has a distinct shape. Topography refers to the configuration of the land surface described in four categories: ÿthe major landform, which refers to the morphology

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    S., R. Powers and W. Schoenberg. 2008. Peak Oil, EROI, Investments and the Economy in an Uncertain Future. In Biofuels, Solar and Wind as Renewable Energy Systems: Benefits and Risks. Pimentel, Ed. Netherlands, Springer

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