IMO being happy to debate people on a tv stage does not mean that all of what you are saying is either factual or correct. IMO it probably says more about your personality & I admit that Monckton is a charismatic performer - but then again, so was Hitler & he was pretty convincing as well.
As to being factual - I've experienced Mexico City firsthand, so too Beijing & Xian. I also know that via respiration we exhale wastes including CO2 & that when 25m of us live close together in a poorly ventilated bowl that all is not well. Indeed, the facts are that Mexico City exceeds maximum tolerable air pollution levels for more than 300 days each year.
IMO Monckton's prescription of doing nothing while CO2 levels rise is irresponsible & represents flawed logic.
Still unconvinced? Why not pay a visit to Mexico City & experience what it all means for yourself. Otherwise just remember what happens if you put a plastic bag over your head.
