Aerial view of water treatment plant by lake on sunny day
Schlüsselwörter
aerial,
water,
treatment,
plant,
lake,
sunny,
day,
environment,
ecology,
technology,
industry,
outdoors,
bird,
eye,
sewage,
purified,
footpath,
path,
tree,
sunlight,
conservation,
nobody,
nature,
growth,
circle,
round,
shape,
clean,
factory,
industrial,
building,
cleaning,
green,
colours,
recycling,
russia
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