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Friday, October 19, 2007

vapour trails


picture of vapour trails made by ships in the Pacific

from here http://www.meteored.com/ram/numero4/imagenrara.asp

good fact from geology - the northern hemisphere is more dusty than the southern hemisphere. This partly natural, because the northern hemisphere has a greater land mass. It is also because of the pollution caused by the many large cities in the northern hemisphere.

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