Sunday, March 28, 2010
Wednesday, March 3, 2010
Thursday, February 18, 2010
Environment
It is the surroundings that we live in and the surroundings/settings of a physical system that may interact with the system by exchanging mass, energy, or other properties. Most of all, it is something that we should respect and take care of as what ever happens to it will effect us, one way or another.
Wednesday, February 3, 2010
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