Biodegradable Plastic Shopping Bags

In 1 week we will have had a biodegradable plastic shopping bag hanging up in full sun and rain for 18 months, besides some light fading of the printing on the bag, you could still use it.

I suppose they must get away with it because its like stating the 'Sydney Harbour Bridge' is biodegradable - It may just take 50,000 to 100,000 years!