Right. I pretty much refresh and reuse our potting soil.I guess in potting soil my only concern would be disposal. How do you get rid of styrofoam-polluted potting soil?
I did find out that Styrofoam lasts over 500 years. However, it is not normally considered very dangerous unless you subject it to very high heat, like in a microwave. Then the chemicals can leach out. Other than filling up the landfills, it sounds like Styrofoam is not consider very harmful even if eaten by animals. Unfortunately, for a number of reason, Styrofoam is not recycled and is considered a waste product after use. Better to use paper based containers that can be recycled or composted, I guess.