Formation of Haze

  • Two types:

    • dry haze - large/giant particles in the air (smoke, smog, dust)

    • wet haze - H2O condenses onto hydroscopic CCN - can occur at RH's as low as 75%

    • wet haze has a dull gray, white color

QUESTION FOR THOUGHT:

Why does the relative humidity seldom reach 100% in polluted air?