Ozone Layer — O3 absorbs UV CFCs depletion Montreal Protocol | CBSE Class 9 Biology | Synapse

📚 Ozone Layer — O3 absorbs UV CFCs depletion Montreal Protocol
CBSE | Class 9 | Biology
Chapter: Earth as a System: Energy Matter and Life

• Ozone Layer: 15-30 km up
• Montreal Protocol: 1987 treaty
• Ozone Hole: Shrinking slowly

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🎯 THIS VIDEO COVERS 4 LEVELS:

🟢 EASY — Simple introduction, no prior knowledge needed
🟠 MEDIUM — Class 9 exam depth, key concepts
🟣 HARD — Board exam analysis, theory connections
🔴 HARDEST — JEE/NEET competitive depth

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🌐 FULL STUDY NOTES + PRACTICE QUESTIONS:
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📌 CHAPTERS IN THIS VIDEO:
00:00 Introduction & Overview
0:34 🟢 Easy Level
2:30 🟠 Medium Level
5:52 🟣 Hard Level
9:37 🔴 Hardest Level
14:54 🎓 Subscribe & Explore

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Видео Ozone Layer — O3 absorbs UV CFCs depletion Montreal Protocol | CBSE Class 9 Biology | Synapse канала Abhrajit Pal