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what is chlorophyll?
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It's basically a group of green pigments used by organisms that convert sunlight into energy via photosynthesis. First used in 1819, the noun chlorophyll derives from the Greek words khloros, meaning "pale green" and phyllon, meaning "a leaf." Plants use chlorophyll to trap energy from the sun.
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Sadness is an emotional pain associated with, or characterized by, feelings of disadvantage, loss, despair, grief, helplessness, disappointment and sorrow. An individual experiencing sadness may become quiet or lethargic, and withdraw themselves from others.
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