In the presence of natural or artificial light (this applies also indoors) the photocatalyzer significantly speeds up the natural oxidation processes that cause the decomposition of pollutants, transforming them into less harmful compounds such as water, nitrates, or carbon dioxide.
I'm not sure why you've been moderated as Funny, that's what it's called: http://en.wikipedia.org/wiki/Streisand_effect
I hear they're going to call it a Dysonosaur.
Actually, it's "maths" because it stands for "Mathematical Anti-Telharsic Harfatum Septomin".
So there.
(Serious answer: mathematics is plural, meaning "the mathematical sciences", so should be shortened to maths.)
I fully agree with you there. I was going to tack on a footnote to say that there are far worse things than CO2 but I didn't. Sorry.
*goes off to perform some self-flagellation for piss-poor posting*