#impureness__impurity  the condition of being impure
  exclusion:  #pureness
  supertype:  #condition.state__status  a condition or state at a particular time: "a condition (or state) of disrepair"; "the current status of the arms negotiations"
  subtype:  #adulteration__debasement  being mixed with extraneous material
  subtype:  #admixture__alloy  the state of impairing the quality or reducing the value of something
  subtype:  #taint__contamination  the state of being contaminated
     subtype:  #dust_contamination.taint__dustcontamination  state of being contaminated with dust
  subtype:  #dirtiness__dirtines  the state of containing dirty impurities
  subtype:  #putridity  the state of being putrid
  subtype:  #pollution  undesirable state of the natural environment being contaminated with harmful substances as a consequence of human activities
     subtype:  #biodegradable_pollution__biodegradablepollution  pollution that is rendered harmless by natural processes and so causes no permanent harm
     subtype:  #nonbiodegradable_pollution  pollution that accumulates in the environment and may appear in the food chain
     subtype:  #air_pollution__airpollution  pollution of the air; "air pollution reduced the visibility"
        subtype:  #acid_rain__acid_precipitation  rain containing acids that form in the atmosphere when industrial gas emissions (especially sulfur dioxide and nitrogen oxides) combine with water
        subtype:  #industrial_pollution  pollution resulting from an industrial plant discharging pollutants into the air
        subtype:  #miasma  unhealthy vapors rising from the ground or other sources; "the miasma of the marshes"; "a miasma of cigar smoke"
        subtype:  #smog__smogginess  air pollution by a mixture of smoke and fog
     subtype:  #noise_pollution__noisepollution__sound_pollution__soundpollution  annoying and potentially harmful environmental noise
     subtype:  #thermal_pollution__thermalpollution  harm to lakes and rivers resulting from the release of excessive waste heat into them
     subtype:  #water_pollution__waterpollution  pollution of the water in rivers and lakes

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