Plants at Night
Date: Around 1999
Is it safe for human beings to sleep with plants in the bedroom?
I think that you're asking about oxygen levels at night. Although plants
do respire (need oxygen) at night, the amount is tiny compared to the
availability of oxygen in the home.
However, a greater concern would be for allergy and asthma sufferers, in
that the soil surrounding some houseplants may have molds and mildews, and
dust accumulating on leaves which may cause problems.
Anthony R. Brach, Ph.D.
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Update: June 2012