I have wondered if we could kill them if we were to rig up a hose from
an exhaust pipe and push carbon monoxide into the tunnel system. Might
just cause the engine to stop, from the resistance.
But then you wouldn't have such rich, aerated soil!
But yeah, that works, so I hear.
Bev
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BevanRon of EarthNSky Farm NW Georgia USDA Zone 7
34.498N 85.076W Bev is Earth, Ron is Sky