As and parasites, a huge number of plants

As
our population increases approaching 7 billion, the results of human actions
towards the ecosystem are measureless. Many human activities has affected  the ecosystem. Some of the impacts on the
ecosystem are climate change, genetic modification, habitat destruction and ozone
depletion.

 

Climate Change.

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Climate
change is one of the major impact . The earth’s climate always rise and fall
over time as for many factors. However, according to US Environmental
Protection Agency, human acts are the main reason for an increase in
temperature around the globe. Human acts hand out to the climate changes by
giving rise to changes in atmosphere through greenhouse gases, aerosols, and
cloudiness. The massive reason for the climate change comes from fossil fuels
burning which release carbon dioxide to the earth’s atmosphere.

Greenhouse
gases has affected the weather pattern by modifying  the incoming solar radiation and out-going
infrared radiation. The changes in the weather pattern has caused  changes in the climate. As a result the
climate changes maybe increase in temperature ( becomes hot ) or decrease in
temperature ( become cool ).

 

Genetic modification.

            The main purpose of genetic modified
organism especially in plants is to enlarge the harvest so that it can provide
sufficient food for a huge population. Furthermore, modified plants have a good
quality to become resistant towards disease and parasites. By becoming
resistant toward disease and parasites, a huge number of plants can be saved
from being died. It also can live in extreme temperatures and grow vigorously
even with less water.  However, the purpose
of genetically modified plant is not deliberate. For an example, according to
some facts, continued use of herbicides like glyphosate has caused many weeds
to become immune to their effects. In fact, 249 species of weeds are now immune
to all normally used herbicides. The only way to get rid of them is to till the
soil, which exposes the soil to sunlight and kills the organisms that help make
the land fertile.

 

 

 

 

Habitat Destruction.

Habitat
destruction caused by the human acts has affected many species and ecosystem. Two
example of habitat destruction is deforestation and desertification.

Deforestation
takes place when a forest or stand of trees were cut off, transforming the land
to a wasteland. This action causes the ecosystem to be altered drastically and
obvious loss of  biodiversity.
Deforestation is an outcome of timber harvesting or clearing land for
agricultural, commercial or residential use. The loss of biodiversity and trees
have made a different to the ecosystem . Deforestation can lead into climate
change and extinction and indirectly causing desertification to occur.

Desertification
is the degradation of land quality and features low biodiversity, dry
conditions and poor soil quality. Deserts is caused by both natural processes
and human activities. However, nowadays the deforestation caused by human
activities is higher than that that is caused by natural processes.

 

Ozone Depletion.

            The ozone layer has its ability to
absorb harmful UV rays that would be injorious to all the living things on the
earth. Without an ozone layer,it will be difficult for the living things to
live as usual in a very hot climate . Ozone is made up of three bonded oxygen’s.
Ozone absorbs UV radiation and protect all living things . However some ozone-depleting
substances which is made up of chlorine and bromine ruin the cabability of
ozone to absorb UV light. As a result, plants that are sensitive to UV light
cannot grow vigorously because of extreme temperature whereas human may be
affected by many diisease especially skin cancer. According to certain facts, although
most chemicals that deplete the ozone layer have been banned, the chemicals
that have already been released can take upwards of 80 years to reach the upper
atmosphere, so it will be some time before our protective boundary will be
fully functional again.

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