Fall Colors
The banks of a rushing brook are littered with colorful leaves in a spectacular scene of the fall season. Shortening days signal the coming of cold weather to broad leaf trees. Unable to protect their leaves from the chill they shed them after extracting the foliage's essential nutrients, such as nitrogen and phosphorous.Before leaves fall in autumn they treat peepers to riotous color displays but most of them don’t “change” color. Natural pigments called carotids, which produce yellow, brown, and orange hues, are always present in leaves. During the growing and photosynthesis season they are masked by green chlorophyll.


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