The ban on dichlorodifluoromethane, the generic name for DuPont's "Freon", was based on junk science. DuPont funded a large fraction of the agitation against Freon in 1989-1990, because it had already developed alternatives to Freon and its original patent ont he product was approaching expiration.
DuPont has a log history of getting into bed with the government to give itself a de facto monopoly on any given market. For instance, DuPont funded the agitation to prohibit hemp products in the 30's -- an activity coincident with the company's development of rayon and other patented products in the same decade.
The media spoon-fed it to us all, just like all the other chemo-scares. Apocalypse remains in high demand -- fear-mongering sells newspapers and glues eyeballs to the screen. Here's a short list of hazards overblown by the media, way beyond the bounds of sound science: PCBs, DDT, dioxin, Alar, smoking, breast implants, irradiated foods, nuclear power, high-voltage lines, radon, acid rain, pesticides, herbicides, asbestos, ozone depletion, global warming, species extinction, deforestation and overgrazing, among others. Some were later shown to be complete lies, others remain controversial.
If you heard it from the lamestream media, it's probably false.