Why should Styrofoam be banned?

Online Answer
Expanded Polystyrene (EPS) or Styrofoam, is a petroleum-based non-biodegradable foam, which the EPA and International Agency for Research on Cancer consider styrene a "possible human carcinogen" and "that such materials can have serious impacts upon human health, wildlife, and aquatic environment, and the economy.
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Products derived from plastics, and those especially from oil, tend to be seen as environmentally unfriendly. Polystyrene is also slow to biodegrade which adds to its poor reputation among environmentalists..
Polystyrene is highly flammable and ignites at relatively low temperatures. It has been linked with huge fires, often in commercial buildings and warehouses, where its use is more common.