There are far more efficient ways to kill yourself if that really is your goal...
Instead, Get a large plastic water bottle like those in water dispensers... Water, sugar, Champagne yeast/turbo. (Brewery stores)
put a hole in the cap with an aquarium tube in it. This tube runs to another smaller container (bottle, jar, tupperware) with some water in it.
The water acts like a filter so air does not make it into the bigger bottle with your yeast and sugar are fermenting and creating CO2.
Can do this in a 2L bottle too. Keep this around your plants or use another tube in to cap of your water/air filter and run that to where you want. This will give your plants CO2 for about two weeks. Use two or three on a staggered type schedule and they'll never be out of CO2.
Add some activated carbon to your water filter to get rid of the brewery smell too.
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Throw in some pureed fruit like apples and oranges, then filter in 2-3 weeks to have some crappy homemade drinkable alcohol. Put in it the freezer after filtering and take off the ice that forms to bring up the alcohol content a bit more too
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