Would the clouds form as easily as they do if the air were perfectly clean that is if it had no small peice of

Question

would the clouds form as easily as they do if the air were perfectly clean that is if it had no small peices of dust?

Answer 1

They would still form but they would be at much higher altitudes where the air is colder. The dust makes it possible for the droplets to form at warmer, drier conditions but it isn't strictly necessary.

Answer 2

No they wouldn't be able to form at all. They need tiny particles to create water droplets in the first place.