Remember, carbon dioxide is the breath of life for plants. It’s great stuff.
Carbon dioxide is also the source for most of the oxygen we breath.
Earth's early pre historic atmosphere had little or no oxygen present.
Life on earth started as early forms of plant, bacteria and fungi that converted the large quantities of carbon dioxide then present in the atmosphere to the oxygen that we now breathe.
Carbon dioxide in the atmosphere is vital to maintaining the oxygen levels of the air we breathe.