SpookyFrank
A cheap source of teeth for aquarium gravel
the science behind this is sound - congnative ability is higher if c02 levels are closer to outdoor conditions.
the implementation above might be shit - but the idea was good.
“The Harvard group measured a 15 percent decline of cognitive ability scores at 950 ppm and 50 percent declines at 1,400 ppm.”
(450ppm is outdoor levels)
I'm familiar with this stuff. It's why I get so piss-boilingly furious with parents idling their cars outside the school when they come to pick up their kids. One of the reasons anyway.