particulate pollution - pollution made up of small liquid or solid particles suspended in the atmosphere or water supply.
passive solar - using or capturing solar energy (usually to heat water) without any external power.
The amount of light obscured by particulate pollution in the air; clear window glass has zero opacity, a brick wall is 100 percent opaque. Opacity is an indicator of changes in performance of particulate control systems.
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opacity 1) The state or quality of being opaque. 2) The amount of light obscured by particulate pollution in the air; clear window glass has zero opacity, a brick wall is 100 percent opaque.
Additionally, ethanol and biodiesel emit less particulate pollution than traditional petroleum-based gasoline and diesel fuels.
process by which a compound is reduced in concentration over time, through absorption, adsorption, degradation, dilution, and/or transformation. an also be the decrease with distance of sight caused by attenuation of light by particulate pollution.
 See also: Particulate, Pollution, Environmental, Waste, Environment
  
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