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I have encountered it as building insulation recently.

In my neighborhood, millions of styrofoam beads blew away from a construction site, then settled like snow on grass fields, in gutters, and in other nooks and crannies. I reported it to the city and they did nothing. Now that styrofoam will be out there forever.

I would not be opposed to a ban.

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But styrofoam is a great insulator for buildings and lasts over decades. Producing small dust by poor constructing is not good so should be fixed, but insulating significantly contributes to reduce energy usage. I think pros is far more important than cons unless constructor is bad.

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