Scale that down, and you have 2/3 liter of water, 1/3 liter of chlorine, and one person peeing to get the same deadly concentration.<p>I can't base it on any even remotely scientific argument, but to me, something seems wrong with that conclusion; it just seems weird that it would be that easy to get a poisonous concentration. I guess it is that the deadly concentration is of the gas in air, across multiple inhalations. If so, one needs much more of the gas.<p>But as I said I simply don't know. Can anybody else?