That鈥檚 an interesting question. How lettuce turns brown is well known. But why this happens is a different story. Let's deal with the how first. The chemistry that takes place when lettuce leaves...
For many, the colour change of the leaves come September instigates a feeling of melancholy. Still, nobody denies that the reds, greens, oranges, and yellows are a spectacular sight! But what is...
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