Don't get me wrong, pollution is holding heat in overall. This is about heat coming in while older heat (from pollution holding it in the atmosphere for a long tine) is stored in the oceans.
And you are right, the weak ozone layer has a lot to do with why we now rely on pollution shields.
I heard this theory after 911 from a meteorological study on a sudden drop in air traffic. I can see it coming true.
Interesting. So, we are damned if we do and damned if we don't...