Скачать или смотреть Class 9 Chemistry Ch 10 Lec 4 | Global Warming & Greenhouse Effect | 9th Class Chemistry

Welcome to Class 9 Chemistry Chapter 10 Lecture 4, from the Punjab Textbook Board 2025 updated syllabus. In this lecture, we will study Global Warming and the Greenhouse Effect, two of the most serious environmental issues caused by air pollutants.

The greenhouse effect is a natural process in which gases like carbon dioxide (CO₂), methane (CH₄), water vapors, and CFCs trap heat in the earth’s atmosphere, keeping the planet warm enough to support life. However, due to excessive human activities such as burning fossil fuels, industrial emissions, and deforestation, the concentration of these gases has increased, leading to global warming.

👉 Key topics covered in this lecture:
✔ What is the greenhouse effect?
✔ Role of greenhouse gases (CO₂, CH₄, CFCs, water vapors).
✔ Difference between natural greenhouse effect and enhanced greenhouse effect.
✔ Causes and consequences of global warming.
✔ Preventive measures to reduce greenhouse gases.

This lecture is useful for both Urdu Medium and English Medium students. It will help you prepare short questions, long questions, and MCQs for 9th Class Chemistry Punjab Board Exams 2025.

📌 Watch the complete lecture to understand how global warming and greenhouse effect impact our environment.

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📺 Watch the complete Class 9 Chemistry Playlist 2025 here: [   • Chemistry Class 9 | 2025  ]