Leaves are typically green due to the high chlorophyll content. Chlorophyll captures sunlight and uses this energy to make simple sugars from which the plant feeds (photosynthesis). Chlorophyll is lost during this process and is continuously replenished by the plant. As summer days come to an end, the veins that carry the chlorophyll into the leaves gradually close and the hidden yellow and orange pigments are revealed. As a result, beautiful colored leaves, as the ones below, are observed at the beginning of fall.
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