After almost three years of attempting to bring medical marijuana to unincorporated Marin, the Board of Supervisors approved an ordinance that will allow for medical cannabis delivery-only retailers in a unanimous vote on Tuesday. At the same hearing, the board also repealed a previous ordinance that had permitted storefront dispensaries and triggered widespread concern from residents over community impacts. “During the storefront medical cannabis hearing, we heard numerous concerns from the public on our approach—neighborhood…