With China no longer accepting dirty recyclables from the US which are terribly hard to process we're probably on our way back to multi-stream recycling. Sad fact is that apparently the recycling truck is one of the worst causes of contamination when it compacts otherwise good recyclables. It's a bit more effort and a significantly higher rate of trash versus recycling, but in the end I think it would be worth it. Your idea has merit as well, though last I knew bioplastics still had some problems to solve in order to replace standard plastics, still worth pursuing.