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As is presented in the graphs, over-grazing & deforestation are two main reasons for lands becoming less productive and these two reasons contribute to 65% of this short of less productivity of lands. Another important reason for lands are getting less productive is over cultivations which is 28% reason for this effect. All other reasons cause 7% of this decreased productivity of land.The reasons for which the lands degraded vary region to region and according to the table data, European lands are getting less productive by
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