Why do tomatoes change colour?

Why do tomatoes grow green on the plant, and then turn yellow, orange, then red when they’re ripe and ready to eat? What exactly is going on?

Issue 12 is all about colour, including the difference between light and paint, we look at the colours of the spectrum, why leaves and grass is green, about the history of dyes, black & white, why different planets are different colours and more.



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