Plants are: broccoli, sweet potato leaves, chlorophytum, Sansevieria, ivy, aloe, agave, tortoise shell, hibiscus, chrysanthemum, radish, begonia, Commelina communis. Chlorophytum can absorb some harmful gases in the room, and has a certain absorption capacity for formaldehyde. Ivy can be used in in addition to formaldehyde and benzene. It can decompose two harmful substances, namely formaldehyde in carpets, insulating materials and plywood, and xylene hidden in wallpaper that is harmful to the kidneys.

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Formaldehyde is a highly toxic substance, ranking second in the priority control list of toxic chemicals in China. Formaldehyde has been identified as a carcinogen and teratogenic substance by the World Health Organization. It is considered as an allergen and one of the potential strong mutagens. Studies have shown that formaldehyde has a strong carcinogenic and cancer-promoting effect.

The effects of formaldehyde on human health mainly include abnormal sense of smell, irritation, allergy, abnormal lung function, abnormal liver function and abnormal immune function. When its concentration reaches 0.06-0.07mg/m3 per cubic meter of air, children will have mild asthma. When the formaldehyde content in indoor air is 0. 1mg/m3, it will have peculiar smell and make people uncomfortable. When it reaches 0.5mg/m3, it can irritate eyes and cause tears; Up to 0.6 mg/m3, which may cause throat discomfort or pain. When the concentration is high, it can cause nausea and vomiting, cough and chest tightness, asthma and even pulmonary edema; When it reaches 30mg/m3, it will kill people immediately.

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