Obviously, the precautionary principle is important.
The problem right now is that we're trying to remove these substances from our drinking water or our water sources, but it's very difficult. And yet they were put there. Without regulation, their use has been allowed for all kinds of things and, in most cases, they are simply there for comfort's sake. They are not considered essential in products used to package hamburgers or to make waterproof mascara.
So we need better upstream regulations.