Stock photography, photos: Air pollution Stock photos of Photographed 2004 Oulu,Finland,Scandinavia,Europe Photograph: © Reino Hanninen Click for a larger image and more information Keywords associated with this stock photo: environment,protection,pollution,pollute,air,sky,blue,symbol,symbolic,quality,grow,worse,worsen,deteriorate,deterioration,decline,smoke,stack,chimney,energy,burn,burning,fossil,fuel,environmental,environmentalism,nature,scene,scenic,scenery,production,produce,greenhouse,gas,gases,plant,dusk,evening,tree,forest,threat,threatening,tall,high,carnivore,walk,walking,blur,blurred,spoil,spoiling,industry,industrial,combustion,emission,polluted,smokestack,producing,spoiled,person,people,2,two,friend,woman,female,young,20,25,30,35,dog,caucasian,together,outsidenoutdoors,spring,springtime,Finland,Europe,scale