комин, опазване на околната среда, въглищна електроцентрала, заобикаляща среда, замърсяване, замърсяване на въздуха, електроцентрала, промишлено предприятие, отработени газове, дим, пара
Public Domain
Подходящи безплатни снимки
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Public Domain
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Public Domain
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Public Domain
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