Qisqacha ma'lumot
Reja:
1. Havo muhitining ifloslanishi.
2. Ultrabinafsha nurlar ta’sirida ifloslanish.
3. Ftoridlar ta’sirida ifloslanish.
Reja:
1. Havo muhitining ifloslanishi.
2. Ultrabinafsha nurlar ta’sirida ifloslanish.
3. Ftoridlar ta’sirida ifloslanish.
