30. fn addition to tn:. T1:,r-* radiation of gama rays and neutrons, a large amount of radioactive elements wirf also be pioauced by fission processes and possibly other neutron reactions i" i;;-";;;;s material. These elements w1fl adhere to particJ-es formed from "u.po" autii" and, in the case of a land surface burst' also from ground nateriaf. ir.e r.aio."tivity associatea viin Jucrr larti.cles rs called residual radiaticn. for' " a"to"uiiln ut o" close to the surface, initia-uy released neutrons vilr- induce xadioactivity in the ground adding to the fission and weapon debris, r""ia"ui "rai;il;-;" some ground materiar wilf be drar"m into the firebau' since a r""r." ""r"tton will not produce any radioactive rest products. its contribution to res idu"i -""ii"tior. vi,' ie "^"".a--l"rv ry neutron-.induced activity. 3f' Radioactive elements will 10se their radioactivity lrith tine due tc ,,decay,?,The rate of decay varies fron a fraction or-u.-"u"ooa to many years, depending an the element considered. Tbo important uf.r.rrt", st'cntium 90 and cesiurn f3Z, for instance, wifl retain ha.lf of tfr"ir ,*aioi"iivity .ft"" about 30 years, and hence cause fong-tenn health h?-zard.:. carbon f\, -wfricir is formed fron it "-.ritrog"r, r,. the atmosphere wherr irradiated with "",rtio.r" "- rr*= a half-life of about 5,Boo years and 'rill thus continue to give "rdl ";;i;;iin'oo " "* to many generations. 32' Particles containing residual rad.iation are usuarly refe*ed to as I.al1out. The .later the fallout reaches the ground" the iess hazardous it is, due to the decay of the radioactivity' Earry falloit """"ri=i"rv for a su.r'face or very low air illll: r"t hence these types r'rill n""" r.r'ro". serious consequences than an air
**Analysis**
This text appears to be discussing the effects of nuclear radiation and fallout on the environment and human health. The language used is technical and scientific, suggesting that the text is intended for an audience with a background in science or technology. The discussion of radioactive elements, residual radiation, and decay rates suggests that the text is focused on the scientific aspects of nuclear radiation, rather than its economic or social impacts.

**Category**
Science and Technology, Health