thick pollution cloud hanging over skyscrapers line icon vector illustration |
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| navigate by keyword : thick pollution cloud hanging over skyscrapers vector icon line sign symbol black outline illustration smog emissions particulates ozone smoke soot contaminants toxins chemicals acidification respiratory asthma allergens visibility smokestacks vehicles industry urbanization deforestation greenhouse climate health regulations monitoring mitigation exposure indoor ambient |
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| thick pollution cloud hanging over skyscrapers line icon vector. thick pollution cloud hanging over skyscrapers sign. isolated contour symbol black illustration |
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