Yup. Plants don’t consider CO2 a “pollutant.”
Of course CO2 isn’t a pollutant, it is a necessity for survival. However, just because it isn’t a pollutant doesn’t mean that high levels of it aren’t harmful.
Water isn’t a poison either. But, if you drink too much of it, you will die.
CO2 in the atmosphere in very high levels is not a good thing. Whether it causes all the things some scientists say is up for debate, as is the question of what is causing the high levels, and whether anything can be done about it. The fact that it can be harmful in high levels is not.
Apparently neither does the EPA. There is a new restoration process which allows cleaning everything from old paintings and books to brickwork and fire damaged wood. It uses no abrasive, surfactant, or even water. The process uses a high velocity flow of CO2 to propel pelletized dry ice (solid CO2) against the surface to be cleaned. The sudden drop in temperature causes any grime or dirt adhering to the surface to "pop" loose and the flow of gas flushes it away leaving the surface clean and dry.
This process has become commonplace and even manufacture of the equipment used to perform this restoration work has become big business. The consequence of all this is we are now using CO2 literally by the ton as a cleaning agent!
Regards,
GtG
PS All soda and most beer is "artificially" carbonated with CO2, has ANYONE even suggested that we stop doing that?