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

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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