[JohnFen]

Yes, the current biodegradable plastics are, basically, PLA -- the same stuff commonly used for 3D printing.

And they are technically biodegradable, but won't do so in a reasonable period of time outside of industrial facilities. They're better on that count than more traditional plastic, but I'm not sure they're better enough to actually matter.

Hopefully, there will be some advance in the future but, as they say, the future isn't here yet!