human activities such as changes for agriculture, irrigation, deforestation, afforestation, urbanization, and traffic. These changes cause not only physical changes, but changes in the biological properties of land and climate systems. NASA reports that 1/3 to ½ our Earth’s land has been altered by human development. All though forest and trees are cut down for many reasons, the largest reason is for agriculture. Farmers cut down forest to make room for animals to graze and for planting crops. Scientist…
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