Okay so 4 ferns would do it in 250 +- 100 hours then. I'm not saying one home garden will solve global co2 buildup I'm saying its significantly cheaper and potentially more rewarding as a hobby than trying to play god with air quality and a 1k budget. You're also not accounting for gaseous exchange rates related as a function to current air quality. Yes a terrible PPM is 2000 but your body produces less co2 as a result of reduced function in such an environment, therefore increasing the effect of any filtration.
The bottom line is that you need thousands of plants to offset the CO2 exhaled by a single person. From what I can tell the ppm estimates on that page you linked are pretty generous -- they seem to be talking about the plants affecting the CO2 ppm in a very very small environment.
I'm saying its significantly cheaper and potentially more
rewarding as a hobby than trying to play god with air quality
and a 1k budget
I don't think I agree with this dichotomy. It's like saying reading books is more fun than playing the guitar. You can do both! They're not really in conflict!
And anyway, you can do a lot with indoor air quality for 1K.
