Exposure to sunshine is a mood enhancer.
Why do we feel much better when the Sun is shining? - Quora
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The Sun and Your Mood: Why Sunlight Is So Good For You
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Does the sun have an effect on your mood? - Quora
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Why do we feel much better when the Sun is shining? - Quora
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Why do we feel much better when the Sun is shining? - Quora