Yes, part of the challenge is that public perception is, in many cases, ahead of where the science is. In many cases we don't have a crystal clear answer from a scientific perspective.
With regard to science assessment, in the case of microbeads, for example, where there is some pre-existing information we can do a review of pre-existing information and pull that together. It then is subject to a peer review, to make sure it withstands full scientific scrutiny and holds scientific integrity, and then to public comment. Those would be the key steps in a science assessment process.