aerial view of Opole city sewage treatment plant
Palabras clave
aerial,
air,
aircraft,
aeroplane,
biology,
biomass,
circle,
cleaning,
construction,
dirty,
ecology,
environment,
europa,
facility,
factory,
flight,
flow,
fly,
garbage,
industrial,
industry,
land,
plane,
plant,
poland,
processing,
purification,
purified,
purity,
reusing,
recycling,
reduce,
removal,
river,
road,
sewage,
sky,
sludge,
smell,
steel,
tank,
treatment,
tree,
unpleasant,
urban,
water
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