Sunday, November 17, 2013




Reforestation
Reforestation is the natural or intentional restocking of existing forests and woodlands that have been depleted, usually through deforestation. 
We should have a good care of our environment because we live in it. There are many things that we can do in order to save our beloved planet, Earth. One simple way that you can do in order to have a good care of your environment is by doing reforestation. It can be used to improve the quality of human life by soaking up pollution from the air. Plants will absorb carbon dioxide from the air then it will do photosynthesis. By doing photosynthesis, plants will produce oxygen that will be inhaled by humans and animals in order to live and it will also be inhaled by other plants in order for them to respire. If there are many trees, it will mitigate global warming that is mainly caused by humans’ activities. Doing reforestation is also really simple. It’s just like a piece of cake! Why? Because we just need to plant some trees. By doing reforestation, it will prevent natural disasters such as flood and landslide. Those are some advantages that we will receive if we do reforestation.
Although reforestation is really helpful for our environment, there are some people who are opposing reforestation. They are opposing reforestation because for them, trees in the forests are better being chopped, so that they can build many new buildings such as : factories, hotels, apartments, and many others. I want to tell you, that actually they are wrong! How can we survive if there is only little oxygen in the Earth? Guys, you should be wise! Do not only care about your own affairs! You must also care about your environment!
In conclusion, you must plant as many trees as possible because it will give us many advantages. So guys, what are you waiting for? Go get some seeds and plant it everywhere, so that someday they will change into beautiful trees. And remember! Better living, better future! Hope you are blessed by reading my exposition about doing reforestation! One thing that I want to say is please have a good care of your environment! Save the Earth! And make Earth become a better place for everybody! (:
 
Hasil Akhir Solar Windmill


SOLAR WINDMILL
Tujuan       :   Untuk menggerakan baling – baling dengan tenaga surya 

Alternatif bahan yang dapat digunakan :
1.   Panel surya
2.   Motor penggerak
3.   Kabel penghantar listrik
4.   Tiang penyangga motor penggerak
5.   Stereofoam / sejenisnya
6.   Foarm board / sejenisnya
7.   Lem / perekat
8.   Alat potong (cutter, gunting, dll)
9.   Alat pewarnaan (pylox, cutter, dll)


Bahan yang kami gunakan :
1.   Panel surya
2.   Motor penggerak
3.   Kabel penghantar listrik
4.   Sedotan berbahan tebal (sedotan balon) untuk penyangga
5.   Stereofoam
6.   Foarm board
7.   Power glue
8.   Cutter dan gunting
9.   Pylox

Cara kerja  : Bila panel surya terkena sinar matahari, maka akan menghantarkan listrik melalui kabel penghantar listrik ke motor penggerak. Selanjutnya, motor penggerak akan bergerak dan memutar baling – baling.

NB              :  Anda juga dapat menggunakan lampu halogen sebesar 100 watt untuk menggerakan baling – baling tersebut