古い煙突から立ち上る黒い煙と青空
Schlüsselwörter
pollution,
air pollution,
environmental issue,
global warming,
smoke,
chimney,
sky,
factory,
industry,
environment,
eco,
ecology,
difficulty,
air,
nature conservation,
nature,
background,
background,
blue skies,
blue,
weather,
disaster,
image,
energy,
clean,
copy space,
business,
blank space,
future,
oxygen,
unmanned,
manufacture,
trouble,
industry,
smog,
vapour,
tower,
technology,
global
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