The pie chart shows that there are four main causes of farmland becoming degraded in the world today. Globally, 65% of degradation is caused by too much animal grazing and tree clearance, constituting 35% and 30% respectively. A further 28% of global degradation is due to over-cultivation of crops. Other causes account for only 7% collectively.
These causes affected different regions differently in the 1990s, with Europe having as much as 9. 8% of degradation due to deforestation, while the impact of this on Oceania and North America was minimal, with only 1. 7% and 0. 2% of land affected respectively. Europe, with the highest overall percentage of land degraded (23%), also suffered from over-cultivation (7. 7%) and over-grazing (5. 5%). In contrast, Oceania had 13% of degraded farmland and this was mainly due to over-grazing (11. 3%). North America had a lower proportion of degraded land at only 5%, and the main causes of this were over-cultivation (3. 3%) and, to a lesser extent, over-grazing (1. 5%).
Overall, it is clear that Europe suffered more from farmland degradation than the other regions and the main causes there were deforestation and over-cultivation.
The pie chart
shows
that there are four main
causes
of farmland becoming degraded in the world
today
. Globally, 65% of
degradation
is caused
by too much animal grazing and tree clearance, constituting 35% and 30%
respectively
. A
further
28% of global
degradation
is due to over-cultivation of crops. Other
causes
account for
only
7%
collectively
.
These
causes
affected
different
regions
differently
in the 1990s, with Europe having as much as 9. 8% of
degradation
due to deforestation, while the impact of this on Oceania and North America was minimal, with
only
1. 7% and 0. 2% of land
affected
respectively
. Europe, with the highest
overall
percentage of land degraded (23%),
also
suffered from over-cultivation (7. 7%) and over-grazing (5. 5%).
In contrast
, Oceania had 13% of degraded farmland and this was
mainly
due to over-grazing (11. 3%). North America had a lower proportion of degraded land at
only
5%, and the main
causes
of this were over-cultivation (3. 3%) and, to a lesser extent, over-grazing (1. 5%).
Overall
, it is
clear
that Europe suffered more from farmland
degradation
than the other regions and the main
causes
there were deforestation and over-cultivation.