we should protcet forest作文,拜托

we should protcet forest作文,拜托

Should we protect the forest which help to maintain the natural ecosystem? Yes,of course we should! However,do all of you know why the forest should be protected? Now, let's us know something about it.
"Deforestation alters the hydrologic cycle, altering the amount of water in the soil and groundwater and the moisture in the atmosphere. Forests support considerable biodiversity, providing valuable habitat for wildlife; moreover, forests foster medicinal conservation and the recharge of aquifers. With forest biotopes being a major, irreplaceable source of new drugs (like taxol), deforestation can destroy genetic variations (such as crop resistance) irretrievably.
"Shrinking forest cover lessens the landscape's capacity to intercept, retain and transport precipitation. Instead of trapping precipitation, which then percolates to groundwater systems, deforested areas become sources of surface water runoff, which moves much faster than subsurface flows. That quicker transport of surface water can translate into flash flooding and more localized floods than would occur with the forest cover. Deforestation also contributes to decreased evapotranspiration, which lessens atmospheric moisture which in some cases affects precipitation levels downwind from the deforested area, as water is not recycled to downwind forests, but is lost in runoff and returns directly to the oceans. According to one preliminary study, in deforested north and northwest China, the average annual precipitation decreased by one third between the 1950s and the 1980s."
And interestingly the wikipedia states about rainforests:
"In contradiction to popular belief rainforests are not major consumers of carbon dioxide and like all mature forests are approximately carbon neutral. Recent evidence suggests that the majority of rainforests are in fact net carbon emmiters. However, rainforests do play a major role in the global carbon cycle as stable carbon pools. Clearance of rainforest leads to increased levels of atmospheric carbon dioxide. Rainforests may also play a role in cooling air that passes through them. As such, rainforests are of vital importance within the global climate system."
And lastly regarding trees in general it states:
"Trees are an important component of the natural landscape due to their prevention of erosion and significant elements in landscaping and agriculture, both for their aesthetic appeal and their orchard crops (such as apples). Wood from trees is a common building material.Trees have also been found to play an important role in producing oxygen and reducing carbon dioxide in the atmosphere, as well as moderating ground temperatures and increasing albedo. These traits could potentially help to alleviate Global warming."
What's not quoted but is there is that the rainforests provide a habitat for many plants and animals that live nowhere else and when the trees get chopped the animals have nowhere to go and become an extinct species so it lessens the biodiversity of the planet. It is there somewhere if you scroll down a bit.
As a conclusion, we should protect the important forest as fast as we can.Let's us live on this healthy earth forever.