3. Those who live the closest to the EQUATOR, which is the center of the planet, never experience the season of autumn. Around the equator, the temperature remains consistently warm.
4. Yellow, orange and variations thereof always reside in the PIGMENTATION OF TREE LEAVES, but they are just overpowered by the abundance of green from the chlorophyll in the leaves during the rest of the year.
Come autumn, however, when the sun weakens and days grow shorter, the amount of chlorophyll in leaves diminishes, allowing other pigments in the leaves to show through.
5. RED and PURPLE LEAVES are actually caused by the presence of sugars from sap that is trapped inside the leaves.
So, That's Why Sugar Maples Are So Pretty in the Fall. --DaCoot
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