All biodegradable materials don't degrade the same in every condition. For example, both cedar timber and romaine lettuce are biodegradable, but you wouldn't co

All biodegradable materials don't degrade the same in every condition. For example, both cedar timber and romaine lettuce are biodegradable, but you wouldn't coat your exterior walls in romaine lettuce. But if I buried both in humid soil and waited 10 years before digging them back up, I'd likely see no sign of either. Most plastics are not biodegradable. They don't degrade in any condition. If I buried a fidget spinner and waited 10, 100, or 1,000 years, It'd still likely find most of a fidget spinner when I dug it up.