I remember back in college I wrote an article regarding biodegradable plastics, it was my aunt who works at Biotech had a project like that. And recently, I wanted to bring my own bag (B.Y.O.B.) when buying grocery... but I noticed that SM plastic bags have this:
cool eh, it's nice to know that SM's concern and doing their share for a better world.
Anyway, I keep their plastics since it's biodegradable and besides I don't need to bring my own bag. and I used them for the plastic bottles collected for proper disposal :)
