U.S. states that have used the gas chamber as a form of capital punishment.
Color key
GREEN states once used the gas chamber, but don't anymore
TEAL states currently have the gas chamber as a secondary method of execution
Not on this map: (used in other images in series, see below)
BLACK states use ONLY this method
Dark RED states use this method as the PRIMARY method but have other secondary ones
Related images
I have tried to get some other forms of capital punishment in the U.S to have similar maps showing their usage (same color scheme). The first of these four was not created by me, though I did update it. The other three I created, based upon the first one:
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**Updated by Shadowlink1014 on March 14th, 2007... color key has been updated, see below. Usage of gas chamber for capital punishment by U.S. states. Key: States colored teal currently retain the gas chamber, but only as a secondary form of execution