White smoke in the blue sky
Palabras clave
air,
air pollution,
beijing,
blue,
chemical,
chimney,
china,
climate,
contamination,
ecology,
emission,
energy,
environment,
environmental,
filter,
fog,
fume,
gas,
global,
industrial,
industry,
monoxide,
nature conservation,
pollution,
refinery,
sky,
smog,
smoke,
steam,
technology,
thermal,
tower,
toxic,
vapour,
warming,
white
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