Lively close-up of fallen autumn leaf with vibrant backlight from the sun
Why do leaves change Colour in autumn UK?
As the weather cools in autumn, the leaves start to receive less sunlight. Less sunlight triggers chlorophyll to break down (and the tree does not replenish it) revealing the new, colourful pigments underneath and treating us to beautiful autumn yellows and oranges.
Source: www.forestryengland.uk
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