A faint smell of gas usually hangs in the air.

Strangely, the smell of burned hair hung in the air.

The smell of his own body hung around him like a curse.

That smell would hang around near enough forever as to make no difference.

Perhaps you know a place nearby where the smell of death hangs heavy?

The smell of gasoline hung heavily in the cold air.

The smell of smoke still hangs in the air more than two weeks after the attack.

The sweet smell of new cedar hung in the air.

The smell of fish hung in the air like a perfume.

Now there was nothing but fish processing, and the smell of it hung over the town.