According to the World Health Organization (WHO), air pollution causes 7 million premature deaths worldwide each year. Indoor air quality is often up to three times worse than outdoor air quality. Does it make sense for your health to get an air purifier? And what should you pay attention to when buying one? Professor of Bioscience Engineering Siegfried Denys (University of Antwerp) gives advice. Consumer organization Which? (UK) investigated which air purifiers effectively purify the air.
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