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Figure 6.8 Layers in the Earth's atmosphere.

Only a small amount of the heat given off by the Sun enters the atmosphere; most is lost in space. About 34 per cent of the sunlight that enters the atmosphere is reflected back into space by clouds. Only 19 per cent of the sunlight that enters the atmosphere heats it directly. The remaining 47 per cent heats the ground and seas. Re-radiated heat from the ground and seas causes most of the warming of the atmosphere.

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