There you go again, using logic and reason. Doesn't work with progressives.
Efficiency does matter.
If you use less wood to heat your house because you burn it completely and keep the heat in your house instead of going out the chimney,
then you will produce less CO2, not that plant food is a pollutant, mind you.
Someone above said he installed one of these “approved” stoves and used half the wood that he did before.