Section 1
📖
Lecture & walkthrough
The complete written lesson — the atmosphere & its layers, air pollution (CO, SO₂, NOx, particulates), acid rain, ozone depletion & the CFC mechanism, the greenhouse effect & global warming, water pollution (BOD/COD, eutrophication), and green chemistry — with Karachi & Pakistan examples.
10 sections · ~25 min read
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Section 2
🎬
Interactive lecture
As you scroll, a live D3 panel animates every idea: the layered atmosphere, SO₂/NOx turning rain acidic, an ozone-destruction simulator where UV splits a CFC and one Cl• atom wrecks ozone after ozone, the greenhouse trap warming a thermometer, and fertiliser runoff crashing a lake's oxygen.
Same content · live D3 animation per section
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