CHARLOTTE, N.C. — We look forward to the leaves changing to the beautiful fall colors each year, but what causes them to change from green to yellow, orange and red?

Leaves are green in color because they contain chlorophyll . As the growing season comes to an end in the fall, leaves gradually lose chlorophyll production and other pigments become more active. The pigments determine which color the leaf will turn. Whereas the presence of a different pigment may make the leaf more red, more orange, or more yellow.

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In some plants, the changing color of its leaves is quite uniform and the entire tree will appear in the same color. However, in some other

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