Maybe some of you remember my symbol is about asid rain but in assignment 2 its seem like i change my area of global warming is deforestation.The truth is,asid rain is also connected to tree,asid rain will slowly effect the natural that is tree or jungle.
Firstly,i have two sketches for assignment 2,first is a building that is been destroy by the asid rain
second,a tree that mean we must protect nature from asid rain (pollution)
Lastly,i took the positive not the negative side that is the tree.
That is the reason why i choose to pick to draw the tree.
Tuesday, August 19, 2008
My whole idea for assignment 2
Posted by siti nurul antasha at 1:19 AM 0 comments
Monday, August 18, 2008
More!!!!!
huhuhu,i try to upload the image when i coloured the leaf but its see the data had corrupted >.<
this is the image where i add up some touch up on the tree.
i use darker colour of chocolate and drew some line on the tree using a brush tool.
Posted by siti nurul antasha at 8:18 PM 0 comments
first thing first,sketch ^^
Posted by siti nurul antasha at 7:24 PM 0 comments
Friday, August 15, 2008
Thursday, August 14, 2008
My research about deforestation
THE MEANING
Deforestation is the permanent destruction of indigenous forests and woodlands. The term does not include the removal of industrial forests such as plantations of gums or pines. Deforestation has resulted in the reduction of indigenous forests to four-fifths of their pre-agricultural area. Indigenous forests now cover 21% of the earth's land surface.
Deforestation causes
* conversion of forests and woodlands to agricultural land to feed growing numbers of people
* development of cash crops and cattle ranching, both of which earn money for tropical countries
* commercial logging (which supplies the world market with woods such as meranti, teak, mahogany and ebony) destroys trees as well as opening up forests for agriculture
* felling of trees for firewood and building material; the heavy lopping of foliage for fodder; and heavy browsing of saplings by domestic animals like goats.
To compound the problem, the poor soils of the humid tropics do not support agriculture for long. Thus people are often forced to move on and clear more forests in order to maintain production.
CONSEQUENCES OF DEFORESTATION
* Alteration of local and global climates through disruption of:
a) The carbon cycle. Forests act as a major carbon store because carbon dioxide (CO2) is taken up from the atmosphere and used to produce the carbohydrates, fats, and proteins that make up the tree. When forests are cleared, and the trees are either burnt or rot, this carbon is released as CO2. This leads to an increase in the atmospheric CO2 concentration. CO2 is the major contributor to the greenhouse effect. It is estimated that deforestation contributes one-third of all CO2 releases caused by people.
b) The water cycle. Trees draw ground water up through their roots and release it into the atmosphere (transpiration). In Amazonia over half of all the water circulating through the region's ecosystem remains within the plants. With removal of part of the forest, the region cannot hold as much water. The effect of this could be a drier climate.
* Soil erosion With the loss of a protective cover of vegetation more soil is lost.
* Silting of water courses, lakes and dams This occurs as a result of soil erosion.
* Extinction of species which depend on the forest for survival. Forests contain more than half of all species on our planet - as the habitat of these species is destroyed, so the number of species declines (see Enviro Facts "Biodiversity").
* Desertification The causes of desertification are complex, but deforestation is one of the contributing factors (see Enviro Facts "Desertification")
Posted by siti nurul antasha at 7:19 AM 0 comments
assignment 2
Posted by siti nurul antasha at 7:09 AM 0 comments