water pollution in river.
Schlüsselwörter
background,
canal,
chemical,
corrosion,
danger,
dirty,
disaster,
dump,
ecology,
energy,
environment,
factory,
fatal,
flowing,
garbage,
global,
industrial,
industry,
influence,
life,
liquid,
natural,
nature,
pipe,
pollution,
problem,
refinery,
river,
rust-eaten,
sewage,
stream,
substance,
technology,
toxic,
tube,
unhygienic,
urban,
warming,
waste,
water
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