| Extraction of pure cocaine was first done from the leaf of the Erythroxylon coca bush, which is foun ... - Jack Smith |
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| This article talks about what marijuana is, how it works on human body, its dangers and the way its ... - lazarstalin |
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| There is an ongoing debate about the beneficial properties of Marijuana and its effects on the user. ... - Samuel Durand |
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| Testing for the presence of illegal or banned substances has been in practice for some time, and is ... - Christy |
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