The current annual output of formaldehyde in China is very large, and the occupational hazards of formaldehyde are very wide, such as used in the production of resins, the manufacture of plastics and coatings, fabric finishing and the production of industrial chemicals. Formaldehyde can not only cause nasal cancer and sinuses Cancer, and may cause leukemia. Because the current evidence on leukemia is limited to epidemiological findings, it is not yet possible to analyze the mechanism of leukemia canceration. The "formaldehyde carcinogenic analysis" released by the World Health Organization was contaminated by 26 experts. Results of reviews in 10 countries. What does this text say? ['Formaldehyde has been identified as a carcinogen.', 'Don\'t take "formaldehyde pollution" like a breeze.', 'Attention should be paid to formaldehyde pollution.', "Experts' advice to prevent formaldehyde pollution."]