Border wars: Plumbers union fights green building because the waterless no-flush urinals will "spread disease". Um, don't you mean they will spread "l

I’m intrigued by stories such as this one in the ABC News about the plumbers union in Philadelphia who claim that no-flush green urinals are a health threat. I wonder if the union sees them more as a health threat to the UNION DUES than to the USERS.

Does anybody have any information on negative health effects of waterless urinals??