The pie chart below shows the main reasons why agricultural land become lesson productive. The table shows how these causes affected three regions of the world during the 1990s.

The provided pie chart depicts five primary causes of agricultural area degradation. The table shows the impact of these causes on three different regions around the world in the 1990s.

Overall

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, it can be seen that over-grazing had the most considerable effects on the land among the others,

while

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Europe had a far higher percentage of unproductive land compared to the other two regions during

this

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time period. Moving to a more detailed analysis, the rate of over-grazing was the highest, accounting for 35%. Deforestation was the second contributing factor to degradation,

whereas

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over-cultivation was the

third,

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at 30% and 28%, respectively. The figure for other reasons affecting deterioration was the lowest, at 7%. Europe was the most impacted region in total area deterioration (23%), and the main contributing factor was deforestation (9.8%) in Europe. The percentage of degraded lands in Oceania was higher than in North America, at 13% and 5%, respectively.

While

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the most considerable contributor was over-grazing (11.3%) in Oceania, it was over-cultivation (3.3%) in North America.

Moreover

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, Oceania was the only region where over-cultivation did not affect land degradation, at 0%.