In message , Gianna
writes
They didn't identify it as a problem, so did not need to get round it.
They stated that humans have pumped CO2 into the atmosphere but only as
a tiny proportion of the total. They further suggested that as CO2 is
essential to life, and as the total amount is (still) very small
(regardless of where it came from) it was inappropriate to describe it
as a pollutant.

Current atmospheric CO2 levels are about 40% above preindustrial levels.
That may be a tiny proportion of the atmosphere, but it's not a tiny
proportion of the CO2.
--
Stewart Robert Hinsley