Why aren't blue bags, used for recycling in Canada, recyclable?

Question

I've noticed they aren't marked with the familiar triangle of arrows surrounding a number 1 through 7, used to indicate the type of plastic used in its manufacture. This mark is necessary on all recyclable plastic bags in Canada.

Answer 1

There are green recyling bags that are biodegradeable - use those. They are not made from petroleum byproducts but from plant sources. They may cost slightly more but breakdown without being processed.