Scientists carried out the study after seeing exaggerated claims about the purifying powers of plants online.
, Waring and his doctoral student Bryan Cummings pored over 12 existing studies relating to indoor plants and air quality, conducted over the past three decades.
The researchers argue studies that suggest plants have cleansing powers don't relate to the home or office, as they were largely conducted in controlled lab environments, where plants were placed in sealed chambers for hours or days. In contrast, buildings are much bigger than such chambers, andUsing the data from the previous studies, the team worked out what is known as the"clean air delivery rate" of the respective plants, a measure of how well something can purify the air.
"The best way to achieve good indoor air quality is to remove any strong sources of pollution inside, ventilate well if the outdoor air is clean, and use effective air cleaning devices if they are available ," said Waring. However, Waring said their potted plants could still have many benefits, even if they aren't cleaning the air—by boosting our psychological health, for example., or Swiss cheese plant. Scientists believe the idea that plants can purify indoor air is
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