This is quite a thoughtful question.

It would be blessing in disguise to have a day when the planet would be pollution free!

Planet without pollution means indirect growth and development. One might wonder how. Well, since there would be no pollution, that could mean, the pollution making things are removed. However, it is practically not possible as human existence has now become dependent on these systems only. So the other approach could be using the same resources with better efficiency, as in the working of these systems get improvised in a way that they are no more toxic and are pollution free.

This feels like a dream come true, and maybe might feel impossible to happen. Bu, there is and will always be there a scope of change and development. We might see this happening by 2050 or maybe next century only if the required changes are made.

I hope this answer helps!😊