Breathe. It's a good thing. We need to breathe to live. Breathing consciously relaxes us. “Breathe” is also the name of a great song by Pink Floyd from the Dark Side of the Moon album.
Breathe, breathe in the air
Don't be afraid to care
Leave but don't leave me
Look around and choose your own ground.
Breathing is required of many life forms. But when it comes to buildings, all this talk of breathing is just confusing.
from Building Science http://www.greenbuildingadvisor.com/articles/dept/building-science/buildings-don-t-need-breathe