The recording- Alan
The PowerPoint slides- Andrew
The Editing- Yuan Kai
The Graphs will be uploaded on 13 march 2009 or may be later.
After that Andrew, you have to do the analysis.
Wednesday, March 11, 2009
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PERSEVERANCE IS OUR STRENGTH
Reduce, Reuse, Recycle
Did you know?
Chlorofluorocarbons (CFCs) were invented by Thomas Midgely in the early 1920s. They were used in air conditioning/cooling units, as aerosol spray propellants prior to the 1980s, and in the cleaning processes of delicate electronic equipment. They can also occur as by-products of some chemical processes. No significant natural sources have ever been identified for these compounds - their presence in the atmosphere is due entirely to human nature.
Did you know?
When ozone-depleting chemicals reach the stratosphere, they are dissociated by ultraviolet light to release chlorine atoms, which will act as a catalyst and break down tens of thousands of ozone molecules before being they are removed from the stratosphere.
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