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Plant or plants in your bed room are living organisms, they respire constantly and requre oxygen for it and give out carbon die oxide.Oxygen is produced during day time only as a byproduct of photosynthesis ( Needless to say it occurs only during sunlight.)and Plants do not produce oxygen in night.Aamount of Carbon die oxide gas released by your plant /s during the night is extremely low and will cause no harm if room is proper ventilated otherwise can pose danger .
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