The truth is, the natural world is changing. And we are dependent on that world. It provides our food, water and air. It is the most precious thing we have and we need to defend it.
~David Attenborough ~


Formaldehyde is a gas, formed during combustion, as part of various industrial processes, or, to a lesser extent, by many plants and animals. Manufactured products that may contain formaldehyde include resins, carpets, cleaning agents, cosmetics, paints, particle board, plywood, and other products.

Formaldehyde structural diagram
Image via Wikimedia Commons.

Unfortunately, formaldehyde can have adverse health effects. U.S. EPA classifies it as a probable human carcinogen, and the International Agency for Research on Cancer classes it as a carcinogen.