I did a few rounds with an AI on this topic, so excuse me if there are inaccuracies, but: - According to a study conducted NASA, a 1 mm layer of polyethylene r

I did a few rounds with an AI on this topic, so excuse me if there are inaccuracies, but: - According to a study conducted NASA, a 1 mm layer of polyethylene reduces solar and cosmic radiation by approximately 50% - A 1mm, 1m^2 layer of polyethylene weighs approximately 0.92kg Maybe the polyethylene would decay, but maybe it can also be remanufactured, harvesting the contaminates in the meanwhile? That said, this all implies that working under a polyethylene sheet of 5mm would reduce exposure to about 33 mSv a year (assume 8hrs a day working on surface, 260 days/yr). That said, Maybe robots can work on the surface instead?