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Mehmet Oz, MD, Cardiology, answeredStudies show that houseplants are the best filters of common pollutants such as ammonia, formaldehyde, and benzene. Hundreds of poisonous chemicals may be released by furniture, carpets, and building material and then trapped by closed ventilation systems. Plants absorb toxins and pollutants through their leaves and release oxygen. They provide cleaner air that prevents respiratory and allergic reactions caused by chemicals. Snake plants are a great low-maintenance house plant as they only need to be watered once a week and are available at home and garden stores. Keep them away from kids and pets because they are mildly toxic if eaten.