by cvoinescu » Mon Jan 21, 2013 5:43 pm
That's a lot of chutzpah. There's no known environmental problem with hydrogen cyanide -- in fact, large amounts of it are released when wood is burned, whether by humans or naturally, as forest fires; any quantity we add by heating plastic is insignificant. There is, however, an environmental problem with producing and disposing of paper and/or plastic, which is what those filters are made of. Experiments show that PLA and ABS from all sources tested release no measurable cyanide, so the health benefits related to cyanide are nil. And the ability of those filters to retain hydrogen cyanide is unproven at best. So that project is less green than not doing it at all, and useless to boot. Way to prey on uninformed people's fears!