07 May 2020: Galileo and the science deniers, and physicists probe the mysterious pion
Nature Podcast
The Effects of City Expansion on Biodiversity Loss
Painting buildings white can help keep interiors cool and reduce the need for air conditioning by reflecting the sun's energy. A team of researchers in China and the US have now shown a way to add a splash of colour to buildings without sacrificing cooling capabilities. Their solution involves painting a colourful topcoat, less than 100 micrometers thick, on top of a white undercoat. The near infrared portion of sunlight, which carries about 50% of the light's heat, passes through the eye-catching topcoat, but is then reflected by the white layer underneath.
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