Same folks that were 'skeptics' on the 'Silent Spring pesticides' debate...
In fact, any time there is any question about the safety of any industrial product or policy these skeptics show up with the same arguments, the same lawyers, the same propaganda campaigns, the same politicians, the same lobbyists and the same think tanks.
All these people care about is an uninterrupted and maximized flow of profit. They are no better than drug gangs, arms dealers, bootleggers, pimps or slave holders.