It's a difficult question and it has to be looked at in two different ways. There's a double edge to it. On the one hand, the availability of alternatives should allow us to move more quickly to get rid of substances we don't need to use. On the other hand, we can't be stuck in a place where, if there is no alternative, we can't do anything at all. We also need to realize that when the science is strong enough to identify something that's causing a considerable risk, we need to do something about it. This will be a driver for the development of substitution or alternatives.
On October 24th, 2006. See this statement in context.