I have been very appreciative of the Netflix series Altered Carbon especially thanks to scenes such as those taking place in the location called Aerium.

For those who aren't in the know, the Aerium would be a neighborhood of supertall skyscrapers rising above an heavily polluted city, reaching where the smog cannot, granting those rich or lucky enough to live there clear views and clean air.

I have been wondering what the conditions for such a scenario would be. How tall would the building need to be? How polluted the air? And what about the weather patterns?

Here are the screenshots taken from the wiki:

More elaborately, would it be possible for those dwelling at ground level to experience a grayscale sky even when there would be no clouds (due to considerable pollution and aerosols in the sky), while for those living at the upper floors of the building it would be blue and pristine? Could that be somehow achieved with a taller building?