"While the study of 51 homes detected hydrogen sulfide and formaldehyde ... at concentrations below irritant levels, it is possible that the additive or synergistic effects of these and other compounds in the subject homes could cause irritant effects," the Consumer Product Safety Commission said in its executive summary of the study. Two other preliminary studies found copper sulfide corrosion in metal components taken from homes containing the Chinese drywall. The drywall in question was imported from 2005 through 2007, when a housing boom and two (1 comments)