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Had a boss who used to work in Idaho, designing AV systems. He got called onto a chicken farm once because they needed an audible alarm that could be heard 100 yards away. Apparently if the vent fans in a battery barn go out, and you don't have the secondaries switched on within a minute, the chickens all asphyxiate from the ammonia. Which means, effectively, that battery barns output a 100% lethal stream of ammonia 24-7.
user-inactivated · 2630 days ago · link ·
There's something subtly magical about the wikipedia article on chicken manure. Edit: Also, Imigongo.