346 STANN AR ED Agreement to the dale is as good as for Blair's original assumptions, leis unfortunate thar there is no independen: evidence from Oluloes 4, fc oo . in oncogenesis and it is difficult to visualize howthese could aperate "a 4r.! a single low- and a single high-dose mechanism. Without such Girect crn, the test of the theary rests fie ty tl. on fitumg tines to Gata with cs: scatter. The most nested informaths aia the reaim of deac-response PoUtamisn cs, as tuli and complete coverage a3 possible atlowdoses, an aimest unending 1 fuli rafiees ia sengle experiments, an expensive and ume-consumifqy task. 2°: information jrara celiudar and ussue oiglegy which would verity the recuse. now being, if anything, overworked. Seberier ENVIRONMENTAL ASPECTS a : bf lee a ae one . Fall-out from: weapons fesiny.—The enormous ectivity ceneriied 4. “ falleout cociroversy”” has greatly enhanced our knowredge of ine meteb. os: and effects of the radionuclides produced in fission. In the period of thts re.te « the environmental surveillance activities begun by the AEC and later tne Wo2 Public Health Service have continued regularly. They show continued Cecrsiss in the amounts of radionuclides in tne atmosphere and the biospnere which c2d their origin in fallout. The regular reports from the AEC’s Health and Savers Laboratory in New York City and the several stations of the PHS netwerk reported in ** Radiologica! Health Daia and Reports” should be censu’ted for details. The effects of Siberian, Chinese. and French fests on the inventory oF fission products can readily be detected. Typical and moderately recent reports on the amounts of fission producis and related elements in the environment (158-171) show the behavior ef th: importasi nuclides to be predic.able in bread ierms but idigs. crane i Getans. Remote corners of the world and their indigenous ponulations Five seen searches out and measured and some evidence gathered of especially mugh conceniranacs in simple plants and animal lite in the arctic. The passage of fall-out nuctides through foud chains and their circular or ian the tropcsphere and stratosphere can nowbe viewed as reasonably, estabi.sr2c despite ine need for fuller understanding of many details (E7Z-iaus, The Lote IAEA symposium (180) is an especia!ly useful compendium. Direct measures of long-term effects of an acute fall-out exposure on man are. fortunately, represented by only one incident, the residents of the Marskeu ty vty Ee yt veal aisa ENT RR as Islands in the PacticC, Nar PML icularly Rongelap, and the woo o wee r Tops) a Japanwee Tu wy, try vessel involved in the same incident. The Rangelap group, which was exp to fresh fall-out from the test of a tharmonucitar device ii 354, cus cee nse studied by a multi-disciplinary, multi-institutiona!l group. The micst senitie Imermal conlamicauon wis with isotopes of iadime. Worard et as (dois perc: multiple n odules of the thyrond aland IN_id years arter (se expo CRAM “ tat sta poet wha pe rediity gs 4 imN UM LES areEERE prene‘‘wy meee mrt hv ag “LAR HI vel or w Later PLY } rit me , ow oe wy1 | ye .. teahiy + , ie ata” phe meek bs oop ty - > moo. L . te Sa peai \ ee AUee om bee by Bat: ore pede ge x an 2 bigs ceo. i SesePr heay yea4 , : , vbr to oa . feytaiat ae ge at . : is te “e . Create : whefe om soften ’ oe coe Te Be Wealden woe tog fae yt * eas agree, 1 ch OAT Ao yp pee fem te ee RE ‘ ot es Ug pe Gat ge pidge oe ko gun to OE BSniece ta adgne tare0 FanMRTG vad, PAAR a he whe fe eS aee | . 1 age feels ceca so,Lye . . . fee) estes oe ’ : yee ree me we ht eos . - . x : - aie Pp ered wad ER tssh cute UDayg OE pn te et