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Green-Works is a British charity that attempts to reduce waste by encouraging the reuse of office furniture. Unused furniture sent to Green-Works by other UK-based organizations is resold typically at a lower price. In 2011, Green-Works was taken over by London Re-use Limited.
Green flash occurs because the atmosphere causes the light from the Sun to separate, or refract, into different frequencies. Green flashes are enhanced by mirages, which increase refraction. A green flash is more likely to be seen in stable, clear air, when more of the light from the setting sun reaches the observer without being scattered.
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