I invite you to perform the following experiment:
1. Pull out your #plastic cutting board.
2. Run a bit of water on it, to get it wet.
3. Draw your knife along the cutting board once or twice, as though scraping minced vegetables onto a plate.
4. Examine the side of your wet knife.
If yours is anything like mine, you'll see a bunch of tiny plastic crap you've probably been eating for years.
In other news, I recently switched to a bamboo #CuttingBoard.