There's some interesting - and scary stuff coming out about human cognition and CO2 levels. https://thinkprogress.org/exclusive-elevated-co2-levels-directly-affect-human-cognition-new-harvard-study-shows-2748e7378941#.xqlscz5hg.
I wonder if this ties in with Alzheimer's. I wonder what the CO2 level is in my house - and my husband's office at the mill.
You might also come to
the Building Science Forum, first Tuesday of the month (but not in the summer - we're building things!) at Maine Green Building
Supply on Fox Street in Portland. Call them for details. Bring some beer.