text: essentially impossible fo lredict lrith any accuracy in advance. rn rainy or snouy weather an air burst below the ctouds vhi"ctr ro,rra otrr"""ise have causeJ negligibre fa^l1out cou.l-d produce considerable innediate ana unpreeictable 'ocal fs-lr_out, since radioactive particles will reach tir. gr;;d-throrgh ".io (or snow). The latter rnechanism is of more relative signifiJance ror smar-l yier.d- weapons than for those of large yield, however. 35' The nost important pvocess for an area to become inhabitable again is the natural .lecay of radioactivity. weathering, - i ... trr. effects of rain and wind, vi1l : 'red up the iime reqriired for some "iu" to reach a state of ,,acceptable'radiat ion intensity, since this process witr remove radioacti'e particles into ffater " soil' etc.o here they lrir-l in general be r-ess hazaxdous ih"n oo the ground..Decontaminat ion, finaI1y" vill contribit" io-ainioi"tring the i"t"""itv'-i" timited areas if properly executed. nven so, heavily contaninateC areas vil,l be uninhabitable for tens of years o" .o"u, *ii-irJJent stanaards of radiation safety are to be naintained. c, Radiation inJuries 36. I'luclear radiation will always infl-ict some damage to bioJ_ogical tissue. Genera-lly speaking, this damage ana the """Jiing radiation injury to the organism wil'l be the nore severe' the larger the radiation dose. The definition of ,,dose'rand rel_ated concepts as wet]. ." ih"ir ""i;; ;;; given in table A.1. 37 ' Aln'ost a' of the initial radiation dose rifl be received from high intensity radiation released within seconds in the i"ruai"t" vicinity of the burst. Large doses associated with early fallout wilt on the otner hand be caused by ].ower intensitv radiation re"eived unde' a i"re-;""1;a of time - from hours up to days and in sorne cases even months. A slowly alc,.:mJat"d d.o"u is generally consid-ered:"":.hlTf"l than an equally large instl.nt.tr.o.r" ao"", due to recovery nechanisms.No distinctj.on between these cases wil1 be ,pf,.ia n.""" however.
analysis: The text appears to be discussing the effects of nuclear radiation on the environment and human health. It provides information on the spread of radioactive particles, the process of decontamination, and the impact of radiation on biological tissue. The text does not mention economic development, industry, transportation, or international trade, and it does not seem to be related to education, employment, humanitarian aid, culture, or science and technology in a direct way. Therefore, it is likely that the text belongs to the categories related to natural resources and the environment, as well as health.