petdave -> RE: Thoughts on Bonfire night and the enviroment. (11/4/2007 6:35:11 AM)
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ORIGINAL: Aneirin So fireworks being what they are, a chemical cocktail, the different effects, displays etc, how are they produced, what is introduced into the 'formula' to make a fire work do something different. Thoughts about some might be magnesium, but I am no chemist. A wide variety of things. Copper and cobalt for blue flame, magnesium for brilliant whites, iron for sparkles, barium for green... The list goes on. Old-fashioned black powder is actually not very common in fireworks anymore... they use a composition known as flash powder, which combines a very finely ground aluminum (aluminium, to you [:D]) with an oxidizer such as potassium or ammonium perchlorate. If you look at unitednuclear.com, they offer a wide variety of chemicals used to generate different pyrotechnic effects... Modern fireworks are fairly complex chemically, and i would be quite impressed with any layman who could speak knowledgeably about the environmental results. Far more disturbing to me would be the production process- Chinese, extremely high volume/low quality control, trainloads of chemicals. And i would say that the bonfires on one night in a geographically small, industrialized nation are of zero environmental consequence compared to those used daily across the non-industrialized world for all purposes, not to mention the slash & burn clearing of South American rain forests for agriculture. Just don't burn pressure-treated wood, 'kay? Honestly, i'm just surprised that the Queen still lets y'all play with fireworks!
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