[hanniabu]

As with all things, just because it' possible to do it safely doesn't mean it will (chernobyl anyone?). I have a recycling plant near my house and about once a weak it smells horrible. That's just because it's strong enough to reach me on those days, living about a mile away. Those that live near it smell it every day. IT's been reported numerous times, but as always you're limited to what you can do as a mere civilian (in practical terms, not theoretical terms).

Also as the other comment stated, much of it will no doubt be shipped to burn plants that aren't upgraded with the latest and greatest tech. Even then you also have to worry about proper maintenance of the systems. Sure, you can create regulation to cover all these angles, but I highly doubt that will happen.