Plutonium in the surface air in Japan.
D000393:Air Pollutants / Q000032:analysis*; D000396:Air Pollutants, Radioactive / Q000032:analysis*; D000512:Alpha Particles; D007564:Japan; D010316:Particle Size; D011005:Plutonium / Q000032:analysis*; D012621:Seasons; D013057:Spectrum Analysis
D000393:Air Pollutants; D000396:Air Pollutants, Radioactive; D011005:Plutonium