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How to keep your house cool – cover it with new whiter-than-white paint, says research

By Andrew Parnell, Research Fellow in Physics and Astronomy, University of Sheffield
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From icy tundras to billowing clouds, the colour white crops up repeatedly in our planet’s palette. This colour provides a natural way for light from the sun to reflect back from the Earth’s surface and into space. This effect – known as the planet’s albedo – has a huge impact on average global temperature.

Imagine a world covered entirely with oceans. Although the idea might evoke a refreshing sense of coolness, the absence of reflective white areas would in fact see Earth’s average surface temperature increase…


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