2011年9月16日星期五

What are the causes and effects of these environmental problems?

Like eutrophication,


deforestation,


acid precipitation,


destruction of coastal resources


and wildlife depletion





KINDLY GIVE ME OTHER ENVIRONMENTAL PROBLEMS


along with there causes and effects





please don't give me the link..summarize it for me please..i'll choose a best answer for the one who truly helped me..thanks|||DEFORESTATION-


CAUSE:Tropical deforestation has various direct causes: The permanent conversion of forests to agricultural land, logging, demand for fuelwood, forest fires and drought. Slash and burn clearing is the single greatest cause of tropical rain forest destruction world wide.


EFFECT:Loss of fuel wood, means depriving soil of nutrition, leads to a receding forest. It causes an increase in rainfall, risks of flooding and soil erosion.


A loss of trees emits a high concentration of carbon dioxide and other greenhouse gases, which cause greenhouse effect and increase global temperature slowly.


It also leads to a drier atmosphere that increases the risk of forest fires.


The watershed protection of the forest diminishes, leading to stream erosion, loss of fisheries and water supply, as well as the loss of reaction.


Destruction of natural habitats and loss of species and about 600 species have been extinct every year due to deforestation of tropical rain forests.

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