#environmental_condition__environmentalcondition  the state of the environment
  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:  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
  subtype:  erosion  condition in which the earth's surface is worn away by the action of water and wind
  subtype:  deforestation  the state of being clear of trees
  subtype:  depopulation  the condition of having reduced numbers of inhabitants
  subtype:  clime__climate  the weather in some location averaged over some long period of time
  subtype:  meteorological_conditions  the prevailing environmental conditions as they influence the prediction of weather

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