Fuji has always been somewhat secretive, so guess all you want; I doubt any of us know the real answer. As far US agencies are concerned, there's obviously a lot of ignorance out there. EPA is responsible for the control of poisonous or carcinogenic contamination of the air, water, etc. Medicinal products and drugs are under FDA responsibility. And in many instances, general air quality is up to State agencies. Sometimes these various bureaucracies have conflicting interests.
For example, here in California, certain paint solvents were banned as smog-forming, so certain manufacturers substituted downright carcinogenic solvents for awhile, but which didn't created smog. It took awhile to iron that contradiction out via newer more specific rules. But then they began substituting a nonflammable non-smog ingredient that turned out to have anesthetic properties, so house painters were dying by falling off ladders. So back to the drawing board. Eventually more realistic formulations turned up, but with certain compromises in product quality, higher price, etc - always a tradeoff.
I've seen it all at close range over the years. And I go back as far as when people were condemning the government for banning asbestos in household products, or grinding and sawing it in workplaces, likewise arsenical ingredients, or when monster chemicals like pentachlorophenol and dioxin-laded fluids could be purchased right off retail shelves, not to mention carcinogenic pesticides. All agencies have their foibles. But if you really want to rant at the EPA, blame them for the fact people tend to live a lot longer now than they used to. And if you can't tolerate that fact, and are wistful about old times, then set up your own moonshine still and distill some creosote, and drink that.