Investigative journalist Lloyd Tataryn demonstrated that formaldehyde--used so widely in consumer products that it was dubbed "the workhorse chemical"--should be considered a harmful chemical. The formaldehyde controversy began with the plight of the 80,000 Canadian families who filled the walls of their homes with urea formaldehyde foam insulation (UFFI) in the 1960s and '70s. Many soon regretted taking government grants to install the foam: they...