Сагс хоосон байна
Is the ozone layer in danger?
In this lesson, you will learn what activities have led to the formation of the ozone hole and what you can do to protect the ozone layer.
8 – 12-р анги
Бичсэн: Varga Laura Dominika
Хянан шалгагч: Dormány Gábor, Nagy Márió, Jóri Johanna
График дизайнер: Fasola Martin
Хөгжүүлэгч: Gálea Patrik
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/Веб холбоос
