Foam cups, bowls and containers are made of a lightweight but strong material -- expanded polystyrene. How then does acetone reduce this substance to a blob of goo? In this week's video ...

For comparison, they did the same with solid CDA and polystyrene (plastic) foam. After 36 weeks, the CDA foam had lost 65%-70% of its mass, the study reported. It broke down 15 times faster than ...