The pie chart and the table
illustrate illustrates
the causes of
land degradation in
1990s by globally and the table shows the proportions of land degradation regionally in the 1990s.. Overall, it
shows that there were
are three main factors
of land degradation which were are over-grazing,
over-cultivation and deforestation.
Globally, about 90% of land degradation was is caused by these three main factors. The highest proportion of
land degradation was is caused by over-grazing at
35%, followed by deforestation at 30% and over-cultivation at 28%. The other
factors on the other hand, contributed only about
7% of the total degradation.
The table
indicates causes of land degradation in three regions in the 1990s.. The highest total
degradation was recorded by Europe (23%), followed by Oceania (13%) and the
least total degradation was marked in North America (5%).
Compared to other regions, Europe
had the highest land degradation caused by deforestation at 9.8% and
over-cultivation and over-grazing at 7.7% and 5.5% respectively. While, Oceania had the highest percentage of land degraded
by over-grazing at 11.3%, followed by
deforestation at 1.7%, however, there was no impact of over-cultivation in
Oceania.. North America on the other hand, recorded
lowest percentage 3.3%, 1.5% and 0.2% of land degradation in all the causes listed. due to over-cultivation, over-grazing and deforestation respectively.
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