Damn all these canvas shopping bags piling up under my sink

Canvas bags regularly spill out onto my kitchen floor. What am I supposed to do with all these bags?

What the hell am I supposed to do with all these canvas bags piling up underneath my sink? No faster do I give them away to some charitable organization than they pile up again. That space under my sink could be used for so many other things (unused flower pots for instance, or spare decorative rocks) – but all that ends up there are these damn bags. I open the cabinet door and they literally spill onto the floor. I stuff one into the other and make big balls of them, try to forget about them, but I know they’re there, cluttering up my tiny San Francisco apartment. What am I suppose to do with all these? Is canvas biodegradable?