Consider to make clear: Formaldehyde is had cause cancer and hurried cancer effect strongly, expression is in immune force is unusual, cause nose pharynx cancer, colonic cancer, cause a new life chromosome is unusual, leukaemia.
Formaldehyde is to decorate the contaminant with furniture, release period be as long as 3-15 year, encounter the hot meeting that encounter tide to volatilize in great quantities from material depth, pollute life space and harm health badly.