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POLIETILENO

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osmosis world

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O ensino da química e a educação CTS

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Pepino, o Breve.

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Pepino, o Breve.

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O impacto dos plasticos

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O impacto dos plasticos

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Impact de l’homme sur les récifs coralliens

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Impact de l’homme sur les récifs coralliens

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Paz da africa negra

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