I suppose exhaust is "exhaust gas", but what is "sweat"? Cars are neither sweating nor worrying. What is meant by that?
Ben and I hit traffic. The stop and go of the freeway was made even more maddening by the sweat and exhaust from all of the cars. We had been stuck on the same stretch of road for twenty minutes when Ben asked a question I had been avoiding.
Taylor Jenkins Reid "Forever Interrupted"