CO2 part of nature

About Carbon Dioxide – why is it called a pollutant now when it is part of nature and in fact necessary to plant life?  CO2 is called a pollutant now because we’re generating too much of it, it’s out of balance.  And I suggest to anyone who refuses to understand this wisdom, ask your doctor what would be the effect on your health if you doubled your medication.
(Ms) Drusi Megget