This stuff is not science, it's fear propaganda. Scientists and the media form a kind of complex that allows each to get what they want without consequence when their claims turn out to be wrong. The scientists get publicity, which helps with grants. The media gets to run a scary story, which puts money in their pocket. In twenty years, when doomsday has still failed to materialize, nobody will remember the claims, just like most people today don't remember the doomsday prophecies of twenty years ago. There's no reckoning. There's no penalty to the scientists or the journalists for endlessly dumping toxic waste on the public.