Ladies and gentlemen these Anthropogenic Global Warming religious zealots are so dishonest and misleading its really really sad especially when they claim to be educated people like scientists and lecturers.
First of all a CO2 chimney stack will look like it has nothing coming out of it.
CO2 at one atmosphere 101.3 Kpa solidifies at -78°C, just like water turns into steam at +100°C.
So that stack that hairy arsed baboon has placed in his post above is not CO2 rather its probably steam.
And lets not forget that CO2 follows temperature by a lag of about 800 years, that is if the atmospheric temperature rises, the atmospheric CO2 will follow with a lag of about 800 years.
They're so ferking dishonest it's unbelievable....

And if CO2 was higher in the MWP and 1940 than today where does that leave you with man being responsible for the current warming and increase in CO2?
I'll tell you bullsh!t artists, it leaves you with your c@ck in your hands w@nkers.......