File:Decrease of dioxins in ambient air over 20 years.jpg
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Decrease_of_dioxins_in_ambient_air_over_20_years.jpg (578 × 371 pixels, file size: 43 KB, MIME type: image/jpeg)
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current | 06:31, 26 September 2019 | ![]() | 578 × 371 (43 KB) | commons>Evolution and evolvability | crop |
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