Biodegradable Bin Liners

If we were to replace all plastic bags with biodegradable bags in supermarkets, would we create another problem, namely, using sources of food (wheat corn, etc.) to make these products? should we just take food on the tables of the poor? Is there a way to create biodegradable bags that do not affect the global food shortage?

Another question: does anyone know where you can buy biodegradable garbage bags or plastic bags in Sydney? not in bulk.

Thank you!

These bags are a problem that we should move to Greenbag place, theyre more biodegradable and stronger than plastic bags biodegradable
and yes, it can cause a new problem, we could use food instead of donating to less wealthy nations such as Ethiopia and Zimbabwe.
I think Im some Woolworths, you can try and buy biodegradable bags, I have rarely seen.
some Chinese shops in Eastwood and Carlingford provide biodegradable bags, we can just use them to our line of tanks!