Kyle Boatright wrote:

snip
He said that it is much better now than in the late 60's/early 70's. He
said the airborne pollution in those days was so bad that if you went on a
long X/C you often came back with an oily film covering the leading edges of
the wings. He also added that when he started flying, in the 50's,
visibility was usually far better than it is today.

Any comments?

Good to know that some things are getting better as the years go on.
Usually it is the opposite.


--
Peter