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.
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