What is biting my green bin?

I’ve had raccoons knocking over my bin the last few months (solved with the visible strap), but came out the other day to these marks and green flakes from the bin on the ground. What animal did this?

I’ve had raccoons knocking over my bin the last few months (solved with the visible strap), but came out the other day to these marks and green flakes from the bin on the ground. What animal did this?