I agree, but at the same time I feel that we are losing some of this common folk knowledge. It is strange, because we are in this information age, however it's full of noise. I'm not saying that it's bad to know how things are extensively with scientific rigor. It's good, but we are sometimes throwing the baby out with the bathwater.

My parents had limited vocabulary, but in a way they meant the same thing. Stale air (a hopefully faithful translation from my language) can have many meanings, but in context it means air with high CO2 concentration. I'm wondering how much of this is also the disconnect caused by fast technological progress and evolving language with it.