Let's use a concrete example. A mason-bricklayer may be manually sawing a stone and releasing into the air crystalline silica, a substance that plays a role similar to that of asbestos, which is now recognized as a dangerous substance. If a worker came into contact with a similar element that is the subject of a study, but has not yet been recognized as dangerous, would that employee have the same right to refuse to work as in the past? Would they have the same right to ask their employer to implement the necessary protective measures?
On November 19th, 2013. See this statement in context.