How building codes created the asthma epidemic

I was sitting around with the Farm Manager, and we were reminiscing about the good old days, when nobody had wall-to-wall carpet and everybody had drafty doors and windows.

And hardly anybody had asthma.

Now we've got super-efficient houses that are so air-tight we need air-exchangers, and every other kid is huffing steroids out of their puffer.

That's progress, brought to you by professionals who revise your local building code every few years to make housing more expensive and less occupant-friendly.