The question will be what leaves more undestroyed plastic waste, not whether or not it is non-renewable, but if we can get to a point where using biodegradable plastics works for bottles, then that would change things significantly. Burning is insufficient, because people will keep dropping bottles outside the home; it needs to biodegrade fully without that kind of heat.

EDIT: There are potential hazards of bioplastics even when they are degradable. Not saying it might not become a solution, but it's not yet clear.

https://www.sciencedaily.com/releases/2023/06/230601160216.h...