Korpa je prazna
Ozone
The ozone layer protects the Earth's surface from harmful ultraviolet radiation; however, the presence of ozone near the surface is dangerous.
Hemija
7 – 12. godina
Autor: Vámos-Poljak Zsolt
Lektor: Horváthné Kunstár Andrea
Grafičar: Molnár Mónika
Oznake
mozaLink
/Veb-link