The hot air passing through the duct will cause it to deteriorate.
Recent research suggests that bad air causes 178,000 premature deaths a year.
The bad air could also come from within the earth, and thereby cause the disease.
The thin air causes many visitors to feel dizzy from a lack of oxygen.
This air should cause the eardrum to move a little back and forth.
His body was almost totally wet and the cool air in the cave caused it to steam.
Hot air rising from the bulb caused the windmill to turn.
His experienced air caused many persons to class him as a newspaper reporter, which, in fact, he was.
The air gets stuck in your throat and causes the hiccup sound.
He thinks what's in the air causes some people's skin to crust over.
