SurveyBelépéshu

en


Environmental crisis

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Cars and air pollution

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Industrial pollution

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Environmental pollution

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Nuclear weapon testing

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Hyperion, the natural satellite of Saturn

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The comet Shoemaker-Levy 9

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Átlag: 5 (1 szavazat )
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The comet Shoemaker-Levy 9 towards Jupiter

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Átlag: 5 (1 szavazat )
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An asteroid towards Earth

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Átlag: 5 (1 szavazat )
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The geocentric model of Eudoxus

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Átlag: 5 (1 szavazat )
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