What are Oxo-Degradable Plastics?

Oxo-degradable plastic also known as photo-degradable or d2w degrades in the presence of oxygen and the process in accelerated by UV and heat. One of the claims made for oxo-degradable plastics is they reduce litter as they are biodegradable. A recent study proved that oxo-degradable plastics would be lying around for several years as they do not degrade in the absence of oxygen so are unlikely to break down in a landfill where 98% of the plastic would end up.