We actually don't know that they're safer to puff. We simply don't have any evidence that indicates that they're as or more dangerous. Every variety of plastic

We actually don't know that they're safer to puff. We simply don't have any evidence that indicates that they're as or more dangerous. Every variety of plastic or food additive that ended up being proved harmful was thought safe for years. People are right to be skeptical of them for the next thirty years or so.