. . .
I think tom is thinking of Halon extinguishers, as I see many CO2 ones around, and see them listed in catalogs. Also, I believe that excess CO2 makes you drowsy, so rather than running away or digging away, a groundhog might decide to take a nap, one that he would never wake from.
Sounds like an idea to me, now to figure out how many cubic feet of CO2 are in the big tank that we got at an auction and use for carbonating beer and soda that we make--and then locate the low entrances of the burrows.
Jim Erdman, in Menomine, WI
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