A friend proposed this rather strange idea. I was unable to decide whether or not it was feasible, so I present it to the SDMB for consideration:
Suppose your house has a pest problem: mice, termites, cockroaches - whatever. You call the professionals but don’t like their prices or their chemicals. So you rent a couple of large CO[sub]2[/sub] cylinders and place them in the basement. You seal up the house as best you can, crack the valves to create a slow & steady flow of CO[sub]2[/sub], then depart for the weekend. When you return (or so goes the theory), no living pests remain within the house, as the CO[sub]2[/sub] caused the oxygen level to be insufficient for life.
Could this work?