Thứ Năm, 20 tháng 11, 2014

Deforestation


Deforestation is when human remove or clear large areas of forest land and related ecosystems for non-forest use.These include clearing for farming purposes,ranching and urban use.In these cases,trees are never re-planted.
Where deforestation happen:
Top 10 highest deforestation countries in world:
1)Brazil
2)Indonesia
3)Russia
4)Mexico
5)Papua New Guinea
6)Peru
7)USA
8)Bolivia
9)Sudan
10)Nigeria
Deforestation is one of the causes of environmental pollution, the phenomenon of the earth warming, famine, floods, accidents in village forest elephants quit killing people, destroying property ... as well as the destruction of the forest under the forest canopy caused ecological imbalance serious, leading to erratic climate change, floods, flash floods, landslides, and a lot of diseases.
Worldwide, deforestation causing damage to the $ 45 billion / year. According to the latest statistics from the Ministry of Environment America, each year on average in the world with about 33 million hectares of forest destroyed for many different purposes has generated more than 1.5 billion tons of CO2 into the environment, accounting for 20% of man-made emissions causing the greenhouse effect makes the earth warmer temperatures.
It is estimated that the deforestation as at present, by 2050, up to two billion people, or 20% of the world population will become dehydrated. Most of these people suffer from water shortages living in developing countries. Besides food sources are also at risk threatened to irrigation water becomes scarce.
Effects of deforestation in watershed VN
According to the latest report of the World Food Programme (FAO), VN is one of five countries most heavily affected from natural disasters, especially storms and flooding rain. Rain storms in the territory VN increasing both the frequency and the dangers, are becoming real threats to human life and the development of the economy.
Besides the causes such as geographical features, climate change causes flooding situation in VN is becoming increasingly fierce, there is a direct cause of the people. Watershed deforestation for logging, agriculture development, hydropower ... as vegetation in the basin are decreasing leading to deter poor flow, flood focus faster.
In mid-October last several provinces in central region floods occurred several days of continuous rain caused heavy losses of life and property. This time the rain functional departments rated as one hundred years and concluded, was due to watershed deforestation. When headwater forests are cut down, the intensity of the floods come quickly, making the water rise very quickly. Trees to prevent floods, disasters erratic. When the high water, trees and prevents water power plant roots will absorb flood waters somewhat. There are trees, water power stronger support, windbreak trees and weaken the power in the storm passes through the area. According to scientists, the forest areas and watershed protection forests in the central provinces were razed to make room for hydropower are losing the ability to regulate water when heavy rains upstream, this is a major cause caused more severe flooding days.
Our country is actively implementing two major programs such as the National Target Programme to Respond to Climate Change and National Programme for Disaster Prevention. The central goal of this program is to plant and protect forests. From the model performed until results are still quite a distance away and does not know when the new narrow this gap, to avoid danger to yourself and future generations.
Solution.
_Curb the felling trees,by employing a series of rules and laws to gover it.
_Clear cutting of forests must be banned.
_Cutting must be replaced by planting young trees to replace the older ones that were cut.

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