Why does haze and poor visibility present in stable air?
Traditionally, haze has been regarded as,


  an atmospheric phenomenon in which dust, smoke, and other dry particulates obscure the clarity of the sky...
  
  Sources for haze particles include farming (ploughing in dry weather), traffic, industry, and wildfires...
  
  Whereas haze often is thought of as a phenomenon of dry air, mist formation is a phenomenon of humid air. However, haze particles may act as condensation nuclei for the subsequent formation of mist droplets; such forms of haze are known as "wet haze" ...
  
  In meteorological literature, the word haze is generally used to denote visibility-reducing aerosols of the wet type. Such aerosols commonly arise from complex chemical reactions that occur as sulfur dioxide gases emitted during combustion are converted into small droplets of sulfuric acid. The reactions are enhanced in the presence of sunlight, high relative humidity, and stagnant air flow. A small component of wet-haze aerosols appear to be derived from compounds released by trees, such as terpenes. For all these reasons, wet haze tends to be primarily a warm-season phenomenon.


A haze can also be considered an atmospheric colloid, where,


  one substance of microscopically dispersed insoluble or soluble particles is suspended throughout another substance.


Examples of atmospheric colloids include: fog, mist, clouds, condensation, smoke and atmospheric particulate matter.

The forces behind the suspension of haze particles includes: electrostatic interactions, Brownian motion, van der Waal forces, and entropic forces. The effect of these forces on the light (low mass) particles within a haze counter gravity to keep the particles suspended in air.