deforestation presentation 2010
TRANSCRIPT
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Deforestation is the clearance of naturally occurring forests
by loggingand burning. It can lead to many bad effect to the
global climate.
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Deforestation is a contributor to globalwarming, and is often cited as one of the major causes
of the enhanced greenhouse effect. Tropical
deforestation is responsible for approximately 20% of
world greenhouse gas emissions. According tothe Intergovernmental Panel on Climate
Change deforestation, mainly in tropical areas, could
account for up to one-third of total anthropogenic
carbon dioxide emissions.
Disregard or ignorance of intrinsic value, lack of
ascribed value, lax forest management and deficient
environmental law are some of the factors that allowdeforestation to occur on a lar e scale. In man
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The removal of trees without sufficient
reforestation has resulted in damageto habitat, biodiversity loss and aridity. It has adverse
impacts on biosequestration of atmospheric carbon
dioxide.
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There are many root causes of contemporary
deforestation, including corruption of governmentinstitutions, the inequitable distribution of wealth, population
growth, and urbanization. Globalization is often viewed as
another root cause of deforestation, though there are cases
in which the impacts of globalization (new ows of labor,
capital, commodities, and ideas) have promoted localized
forest recovery.
In 2000 the United Nations Food and Agriculture
Organization (FAO) found that the role of population
dynamics in a local setting may vary from decisive to
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W
hereas deforestation was primarily driven bysubsistence activities and government-sponsored
development projects like transmigration.
By the 1990s the majority of deforestation was
caused by industrial factors, including extractive
industries, large-scale cattle ranching, and extensive
agriculture.
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AtmosphericDeforestation is ongoing and is
shaping climate and geography. Deforestation is a
contributor to global warming, and is often cited as one of
the major causes of the enhanced greenhouse effect.
Deforestation may cause carbon stores held in soil to be
released. Forests are stores ofcarbon dioxode and can be
either sinks or sources depending upon environmentalcircumstances. , the incineration and burning of forest
plants to clear land releases large amounts of CO2, whichcontributes to global warming.
Reducing emissions from the tropical deforestation
and forest degradation (REDD) in developing countries
has emerged as new potential to complement ongoing climate
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HydrologicalThe water cycle is also affected by deforestation. Trees
extract groundwater through their roots and release it intothe atmosphere. When part of a forest is removed, the treesno longer evaporate away this water, resulting in a much drier climate.D
eforestation reduces the content of water in the soil andgroundwater as well as atmosphericmoisture. Deforestation reduces soil cohesion, sothat erosion, flooding and landslides ensue.
Instead of trapping precipitation, which then percolates togroundwater systems, deforested areas become sources ofsurface water runoff, which moves much faster thansubsurface flows. That quicker transport of surface water can translateinto flash flooding and more localized floods than would occur
with the forest cover. Deforestation also contributes todecreased eva otrans iration which lessens atmos heric
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oilDeforestation generally increases rates of soil erosion,by increasing the amount of runoff and reducing the
protection of the soil from tree litter. This can be an
advantage in excessively leached tropical rain forest soils.
Forestry operations themselves also increase erosion
through the development of roads and the use of
mechanized equipment.
Tree roots bind soil together, and if the soil is sufficiently
shallow they act to keep the soil in place by also bindingwith underlying bedrock.
Tree removal on steep slopes with shallow
soil thus increases the risk of landslides, which
can threaten people living nearby.
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Ecological
Deforestation results in declines in biodiversity. The removalor destruction of areas of forest cover has resulted in a
degraded environment with reduced biodiversity. Forests
support biodiversity, providing habitat for wildlife; moreover,
forests foster medicinal conservation. Most predictions of
forestry related biodiversity loss are based on endangered
flora and fauna.
It has been estimated that we are losing 137 plant, animal and insect
species every single day due to deforestation,
which equates to 50,000 species a year.
Predictions have been made that more than
40% of the animal and plant species in
South east Asia could be wiped out in the
21st century.
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If deforestation is a negative event, then a positive event should take place to
counter its effects REFORESTATION! Plant trees and begin doing this in youryard. Trees give off oxygen that is essential for human existence and they, inturn, capture the carbon dioxide that humans and animals exhale. Trees also helpin containing water in its roots. With this simple act, you are able to prevent soilerosion, which is the root cause of landslides!
Use recycled items such as books or pad paper, toilet paper, even shopping bags.If you can, do not waste any of these products so that no new raw materialwould be required to replace them.
Way to balance the needs for resources with the needs to conserve the naturalresources.To make a sustainable development without jeopardizing or depleting the naturalresources.To exploit natural resources in a sustainable way, so these resources can be
replenish and renewed for future generations to continue to use them.
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