Let's infographic this up then. Very true, C02 is vital for plant life, thanks for the help with photosynthesis. Here's the issue, the C02 levels are globally rising: See: https://e360.yale.edu/digest/co2-levels-continue-to-increase-at-record-rate While 02 levels are dropping: See: http://scrippso2.ucsd.edu/ (note: both images are from different locations and different time ranges. If you'd like a single source of info, see https://climate.nasa.gov/evidence/). TL;DR: I'm not a plant.