Investigation of the Issue of Deforestation

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Investigation of the Issue of Deforestation

Deforestation is the removal of large numbers of trees, along with the

loss of the animals that habitat the area.

Deforestation occurs in many ways. Most of the clearing is done for

agricultural purposes-grazing cattle, planting crops. Poor farmers

chop down a small area (typically a few acres) and burn the tree

trunks-a process called Slash and Burn agriculture. Intensive, or

modern, agriculture occurs on a much larger scale, sometimes

deforesting several square miles at a time. Large cattle pastures

often replace rain forest to grow beef for the world market.

Commercial logging is another common form of deforestation, cutting

trees for sale as timber or pulp. Logging can occur selectively-where

only the economically valuable species are cut-or by clear cutting,

where all the trees are cut. Commercial logging uses heavy machinery,

such as bulldozers, road graders, and log skidders, to remove cut

trees and build roads, which is just as damaging to a forest overall

as the chainsaws are to the individual trees.

The causes of deforestation are very complex. A competitive global

economy drives the need for money in economically challenged tropical

countries. At the national level, governments sell logging concessions

to raise money for projects, to pay international debt, or to develop

industry. For example, Brazil had an international debt of $159

billion in 1995, on which it must make payments each year(3). The

logging companies seek to harvest the forest and make profit from the

sales of pulp and valuable hardwoods such as mahogany.

Deforestation by a peasant farmer is often ...

... middle of paper ...

...es water flow is totally stopped,

because reservoirs are built, which also flood local areas, submerging

local habitats(3).

Today, in most developed counties, trees are being replanted faster

than they can be cut down, so desertification is not as severe a

threat.

In developing countries, by contrast, poverty has created a threat to

trees, which can be sold or used as fuel. In these areas erosion is

also common, and along with deforestation, it is causing heavy

desertification.

References:

Deforestation

1) The Choice: Doomsday or Arbor Day-by Jocelyn Stock and Andy Rochen

2) Biology Notes –by Mary P.

3) The Causes of Tropical Deforestation -by John Revington

Desertification

1) Biology Notes –Mary P.

2) Desertification –Kathie Watson

3) Desertification –Dr Michael Pidwirney

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