'E.7.1 Discuss salinization, nutrient depletion and soil pollution as causes of soil degradation.'

'E.7.1 Discuss salinization, nutrient depletion and soil pollution as causes of soil degradation.  Link to worksheet: https://drive.google.com/file/d/0B3Spy779s3hPT2JxVXFma25WZzQ/view?usp=sharing' 

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