Volatile organic compounds (VOCs) are one of the biggest threats to our health and formaldehyde is the most common and known VOCs. Exposure to formaldehyde may cause skin problems or symptoms like nausea, coughing, dizziness and so on. Long-term exposure to higher concentration may also lead to damage of liver, kidneys or central nervous system. Some VOCs are proven to be causing cancer.
Basically, wooden furniture and furniture made with plywood or artificial wood are the major sources of formaldehyde at home. Formaldehyde-based adhesives are commonly used in producing these furniture, which may lead to excessive level of formaldehyde in the air inside your home.