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Človek – chemická továreň

Človek – chemická továreň. Martin Čechvala Michal Mozoľa Banská Bystrica 2009. Voda v ľudskom organizme. Hovorí sa, že najlepšia je voda z vodovodu. Znečistenie vody je na mnohých miestach katastrofálne.

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Človek – chemická továreň

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