The pie chart shows the main reason why agricultural land becomes less productive.

The pie chart shows the main reason why agricultural land becomes less productive.
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The chart illustrates the
causes
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of land
degradation
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worldwide,
while
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the table gives more specific information about less productive lands by region in the 1990s.
Firstly
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, it can be seen how there were three main
causes
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of worldwide soil
degradation
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, which together explained 93% of
this
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phenomenon.
In particular
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, over-grazing was the most significant cause of
degradation
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, with 35%, followed by deforestation at 30% and
over-cultivation
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at 28%.
On the other hand
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, some interesting comparisons, between the above data and some regional ones, can be made considering the table. First and foremost, it can be noted how the percentages of total degraded land varied between North America, with 5%, Europe, with 23% and Oceania with 13%. Differently to the worldwide
causes
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, more than half of North America degrade was caused by
over-cultivation
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, which totalled 3.3% out of 5% of soil
degradation
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.
On the contrary
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, Oceania saw no effects from
over-cultivation
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, with more than 90% of its
degradation
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coming from over-grazing, which ruined 11.3% of total Oceania’s terrains.
Finally
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, Europe had more balanced
causes
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, with 9.8% out of 23% of unproductive lands caused by deforestation, 7.7% by
over-cultivation
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and 5.5% by over-grazing. In conclusion, it can be argued that,
whereas
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worldwide the three main detrimental activities were balanced in their effect on the agricultural sector, regionally there were some differences.
This
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could be caused by diverse predominant activities in the considered areas.
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Vocabulary: Replace the words causes, degradation, over-cultivation with synonyms.
Vocabulary: The word "table" was used 2 times.
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