The USA government states that the New Mexico Trinity nuclear bomb site is still highly radioactive and 'harmless'. It is interesting to note in the era of Electromagnetic Hypersensitivity (EHS) that it is USA government policy that radio frequency (RF) and electricity are also 'harmless'.

The air around you is filled with floating atoms, sliding down the Earth's spacetime curve. Atoms first assembled in the cores of long-dead stars. Atoms within you, everywhere, disintegrating in radioactive decays. Beneath your feet, the floor - whose electrons refuse to let yours pass, thus making you able to stand and walk and run. Earth, your planet, a lump of matter made out of the three quantum fields known to mankind, held together by gravity, the so-called fourth force (even though it isn't a force), floating within and through spacetime.