Benefits

The list of benefits of prefabricated dome homes is long as you can see by reading below. This section covers prefabricated domes being manufactured out of polystyrene, high-performance plastics, and FRP fiberglass reinforced plastic. If they were made of more sustainable materials they would be very attractive as a green living home.

Disadvantages

Petroleum products are unsustainable and harmful to the environment. They made from oil which is limited and therefore unsustainable.  They emit unhealthy toxins during construction and to a lesser degree throughout their useful life. When they are discarded they end up in landfills and in the oceans, because the cost to recycle them is higher than to bury them in landfills, and this is especially true of polystyrene.

One point to be aware of is if you are using polystyrene to insulate your wood, metal or concrete structure then it may just be more efficient to build the entire structure out of polystyrene and save the environmental impact of using the other materials combined with polystyrene.

Solution May be To Build with Mycelium (Mushrooms)

A great solution would be to take advantage of the benefits of this these prefabrication techniques and use more sustainable materials like lucilium (mushrooms) for insulation, reinforce it with basalt (lava) rebar, and coat it with polymer cement. This would solve the problem of using polystyrene and still retain all the advantages of the prefabrication idea.