So I am largely complaining about how confusing it is. Intentionally so. (a) no, most plastics won't get broken down to precursors with enzymes. a few it will

So I am largely complaining about how confusing it is. Intentionally so. (a) no, most plastics won't get broken down to precursors with enzymes. a few it will work with, like that company recovering resins from carbon fiber. or PLA even theoretically. but most of them are a free radical polymerization that I just don't think you're going to be able to meaningfully reverse. (b) making biochar sounds fine. better than the landfill. I'd be most worried about chemicals like fluorine and sulfur making it into the soil.