CO2 is not defined as a pollutant by any respectable scientist. It is a naturally occurring element that is required to produce a life sustaining environment as we know it.
That also is NOT the issue that the "alarmists" have. It is the presence of excessive CO2 amounts. That is the not the same as what you are saying. It is a proven fact that "global warming" (see climate change for the proper definition) exists as we have observed it in MULTIPLE planets. It is a NATURALLY occurring phenomenon. We also have records and scientific for this planet. And it demonstrates beyond a reasonable doubt, that climate change DOES exist.
If we look at the data we have, CO2 appears to cause warming. The appearance is mostly because
no one can name any other suspects, or are ignored when they do.
But for the sake of discussion, let's us the IPCC's number for CO2 warming alone.
The IPCC says that if we double the CO2 level, it would create an energy imbalance of 3.71 Wm^2,
which would cause the surface-troposphere system to increase by 1.2°C (with an accuracy of ±10%)
http://www.grida.no/climate/ipcc_tar/wg1/pdf/tar-01.pdf
Through modeling they
believe this 1.2°C will be amplified through feedbacks to cause additional warming.
The first part is somewhat accepted science, (the warming, if not the level).
The second part, is almost pure speculation, while they know feedbacks exists, the level is so poorly quantified
that the IPCC in AR5 did not give a best estimate for the enormous range (1.5 to 4.5°C)
The tough questions become, is adding CO2 to the environment bad?
The answer is very undecided, but the improvements to life around the planet from the use of
fossil fuels is beyond question.
From what we can see the added CO2 is causing greening around the planet.
What about all the other catastrophic events the warming is already causing?
Well the link between recent weather and any possible warming is even less scientific than the amplified feedback warming.
We live in a very chaotic weather environment, floods, droughts, storms, ect. better communications, and better
reporting, could make it appear like events are more common, when they are not.