English
Русский
Oʼzbek
Subjects
News and articles
About us
Career
Contacts
Profile
Watch history
My library
Notifications
Logout
Русский
Oʼzbek
Online Mektep
Authorization
Home
Subjects
Lower Primary Curriculum
Main
Subjects
Lower Primary Curriculum
Environmental Protection
Atmosphere
Atmosphere
What makes our air polluted?
How to patch the hole in the sky? (ozone depletion)
Hot planet – the greenhouse effect
“Acid rain” – what is it?
