Thursday, October 28, 2010

Deforestation


Deforestation is cutting down of trees.  The function of trees are to take in carbon dioxide in the air and give out oxygen for humans to breathe.  Cutting down tree has broken the cycle to breathing. Due to more trees are cut down the industrials pollution is been emitted into the air and causing more carbon dioxide in the air.  This has lead to respiratory health problems. Some of the common issues are asthma. Deforestation has led to erosion due to no production of land from UV rays from the sun. Also, another issues are creating of endangered species due to extremes climate and loss of habitats.

Problems created by the cause of deforestation are:

1.    Desiccation in moist forest soils – As the tropical rain forest is decreased; the canopy leaves have reduced. The moisture in the soil gets quickly evaporated. This causes land to cracks and soil becomes dry.
2.   Dramatic increase in the temperature extremes – Trees provide shades and helps to moderate the temperature of the shaded region. Without the shade the land would get too cold in winters and too hot in summers.
3.   No recycling of water – Moisture weather in the coastal region falls as rain. The water vapor from the ocean gets evaporated into the sky and condenses in the form of water droplets and forms rain. With the cause of deforestation, rainfall cycle has been interrupted because of loss of trees in the forest area.
4.   Less carbon dioxide exchange – Rain forest are important for the exchange of carbon dioxide. By deforestation more heat is trapped in the atmosphere
5.   More Desertification – According to United Nations Environmental Programme (UNEP) in 1977, deforestation is the main cause for desertification.  Sahara Desert has expanded by 100knw. Desertification threatened 35% of the world's land surface and 20% of the world's population.
6.   Soil Erosion – Deforestation has been known for run off of rainfall, therefore rigorous soil erosion.

These reasons explains that cutting down trees for commercial purposes can effect our lifecycles.  

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