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Chlorine was obsolete even before World War II. It is a dense,
greenish gas with a unique color and odor. Since it is significantly
heavier than air, the gas accumulates and hovers just aboveground and
thus attacks soldiers in trenches, bunkers, crevices, or tunnels. The main area affected by chlorine is the capillary blood vessels in the lungs. The lung tissue would swell into a spongy wet mass and gas-exchange would be impossible. Death from suffocation then follows closely. |