Compostable bags?

Ever see plastic bag substitutes listed as ‘eco-friendly’ or ‘compostable’? How quickly do they degrade and to what? Well, I.E. and R.C Thompson recently researched this in Environmental Science & Technology (“Environmental Deterioration of Biodegradable, Oxo-biodegradable, Compostable, and Conventional Plastic Carrier Bags in the Sea, Soil, and Open-Air over a 3-Year Period.”) this year. Click here for a summary of their work.