A.Because men on the Earth are protected by the atmosphere.B.Because radiation only have short-term effects on men on the Earth.C.Because the Earth is quite far from the radiation areas.D.Because the Van Allen Belts absorb all radiation.
A.Because men on the Earth are protected by the atmosphere.
B.Because radiation only have short-term effects on men on the Earth.
C.Because the Earth is quite far from the radiation areas.
D.Because the Van Allen Belts absorb all radiation.