PS...
I called you "Scott" and then remembered that was part of your former handle, very probably not you real name...my apologies...TAFKASE it is then, though I always thought Scott Evil was a pretty cool name.
Personally, I think saying we need not fear CO2 is kind of like saying a skydiver need not fear an improperly-packed parachute. True, it's not the 'chute that'll kill him...but there's a rapid deceleration at ground level to be considered.
Well, for our kids' sake, I hope you're right...but I don't think it's been determined yet.