The pie chart illustrates the global 
degradation
 of agricultural Use synonyms
land
 worldwide which was driven by three main Use synonyms
factors
. The table shows the three affected Use synonyms
regions
 by the causes in the 1990s. When considered together, there is no correlation between the two sets of data.
Globally, there are four main causes of unproductive Use synonyms
land
, including overgrazing at 35%, Use synonyms
deforestation
 at 30%, Use synonyms
over-cultivation
 at 28%, and other Use synonyms
factors
 at 7%. Use synonyms
However
, these four Linking Words
factors
 do not directly affect the Use synonyms
land
 in the three Use synonyms
regions
. First,  Use synonyms
land
 Use synonyms
degradation
 was caused by different Use synonyms
factors
 in some Use synonyms
regions
. In Europe, Use synonyms
deforestation
 was the leading factor responsible for the total Use synonyms
land
 degraded at 23% with 9.8% Use synonyms
deforestation
, followed by Use synonyms
over-cultivation
 at 7.7%, and over-grazing had a small contribution at 5.5%.
In Oceania, over-grazing was the most significant cause of Use synonyms
land
 Use synonyms
degradation
, affecting by11.3%, Use synonyms
while
 Linking Words
deforestation
 had a minor impact at 1.7%. Use synonyms
Over-cultivation
 did not contribute to Use synonyms
land
 Use synonyms
degradation
 in Use synonyms
this
 region, resulting in a total Linking Words
degradation
 of 13%.
North America had  less unproductive Use synonyms
land
 with a total of 5%. Use synonyms
Over-cultivation
 had the largest impact at 3.3%, Use synonyms
while
 over-grazing caused 1.5%, and Linking Words
deforestation
 was less significant at 0.2% of Use synonyms
degradation
.
Use synonyms
Overall
, over-grazing and Linking Words
deforestation
 were the leading causes of Use synonyms
land
 Use synonyms
degradation
 globally, but have varied significantly across different Use synonyms
regions
.Use synonyms