"In the late '80s we had lowered formaldehyde by 70 per cent," he says. "In the late '90s, with free trade, formaldehyde was going up again. The reason is we can't tell any other country what to do or how to make products. So we are importing lots of particleboard from Mexico which has lots of formaldehyde."Complicating the increase in formaldehyde levels is the tighter, more energy-efficient homes being built, where pollutants build up and are harder to get rid of, says Morris, who believes the biggest problem is inadequate ventilation.
Source: TheStar.com - Tightly built homes jeopardize air quality