Sorry CO2 is NOT a pollutant - what about CO HC ect?
Also the figures are skewed by the cold start gearbox system
The reason given for not classifying CO2 as a pollutant is based upon the fact that it is a natural component of the atmosphere and needed by plants in order to carry out photosynthesis.
No one would argue the fact that carbon dioxide is a necessary component of the atmosphere any more than one would argue the fact that Vitamin D is necessary in the human diet.
However, excess Vitamin D in the diet can be extremely toxic . Living systems, be they an ecosystem or an organism, require that a delicate balance be maintained between certain elements and/or compounds in order for the system to function normally.
When one substance is present in excess and as a result threatens the wellbeing of an ecosystem, it becomes toxic, and could be considered to be a pollutant, despite the fact that it is required in small quantities.
Not as if i copied and pasted that
But think of it as beer, the human body likes some of it.
But too much, and it can kill you.
Same for CO2