The Portland City Council has approved a plan to add fluoride to the city's water; but it was a contentious council meeting. 

They took testimony last week, but did not take any testimony Wednesday.  The opponents interrupted council many times.  Mayor Sam Adams ejected several people from the Council Chambers.

Portland is the largest U.S. city without fluoridation. Medical experts say it's a safe and effective way to keep teeth healthy.

Opponents dispute whether fluoride is safe and say adding the mineral to drinking water violates a person's right to consent to medication.