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tuppenny-whistle-blog · 5 years ago
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Module 1.3
Greenhouse or blanket effect: Water vapour, CO2, methane, ozone, nitrous oxide all hold warmth. 30% sunlight radiated and 70% retained; i.e. a 0.3 albedo. So, the average temp on earth would have been -18deg C, but due to this effect, the average is actually +15 %.
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