His eyes were keen and the desert air was crystal clear.

For once I was happy about the chilly desert air.

He could see a long way in the clear desert air.

Sorry to have you miss any of this desert air.

At last week's convention, however, there were signs of change in the desert air.

I'm glad to see the desert air has done you some good.

Yet that didn't quite make sense, for this did not smell like desert air.

It was full of electricity from the dry desert air.

A mood of trouble lay heavy in the desert air.

The desert air was clear and I could hear the men talking as the night drew on.