1: Light 
Natural daylight is one of the most fundamental human needs. Its significant impact on human happiness and on our mental wellbeing is well proven through research and data. For example, staff in offices with no natural daylight have been shown to sleep on average 46 minutes less than their light-receiving counterparts.
Daylight affects a number of our basic systems, such as the circadian rhythm – our biological clock – which regulates the timing of periods of sleepiness and wakefulness throughout the day. These systems are sensitively ...
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