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Fall Leaves: Why do they change color?

It is that time of the year again, when the leaves start to change color. Have you ever wondered why leaves change color in the Fall.

Well has an interesting feature on fall where they explain how and why leaves get those beautiful colors.

Leaves get their green color from chlorophyll, a pigment found in plant leaves that enables them to process sunlight. Fall's shorter days and cooler temperatures cause the chlorophyll to move from the leaves to the branches, trunk, and roots, and the yellow and orange pigments that are always present become visible.

Other chemical processes produce the brilliant reds,purples and bronzes. On warm fall days, sugar is produced in the leaves of some trees and then trapped by the chill of night. As sugar accumulates, the leaves turn brighter red.

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