is usually toc feeble t3 measure with a hend monitor - that air sampling does not give precise results as the amount of the passing air does not bear a direct relationship to what falls on the ground, The best measures cf the astual fallout available to date are laboratory analysis cf fallout sn gummed paper, in collecting pots, and actual analysis of the scil, There is a dissussisn of atmospheric radiocontamination as a result of uccsontrolled release of materials such as radiokrypton and radioiodine from power reactors and processing plants. They point out that continued control over release of these products as is now dena is essential, Contrsi is by permitting a C "eooling" time for short-lived radicactive materials to decay away, by off-gas creering, and by sahnedu lang release cf materials with due regard to matecrslcgisal sonditions at the time, Theres is a sssticn on possible uses of radioactive materials in the study of the seisnce cf metecrelcsgy, Natural radon gas in the air can ks helpful in understanding vertical move— ments of air from the land, Weapens tests have taught much with respect to lateral spread of air masses at varicus altitudes - how rain scavenges the atmesphere cf particles - the rate of trensport from the stratcspners ts the troposphere and the removal time for water from the atmosphere, Experiments could be conducted using introduced radisactive materials under controlled conditisns to study air flew and diffusion rates, hydrometecrology, i.e¢., con= densation, prscipitation and evapcration, and to study electricity of the atmosphere especially the psssible relaticnship of electri- cal fields to the weather, . As to erfects of nuclear weapons testing on the weather the committee statsd:; for rain, 1, Nuelear Weapon debris was not effective as a seeder 2. Th? amount of icnizaticn produced is insignificant in meteorclogical terms, NAS 3, There has been nc measurable decrease in the amount of direct sunlight reaching the earth whereas voleances have known to desrease it by as mich as 10-20% for appresiable periods of time. 4, The apparent resent pnerease 38 severe storms is probably the result of "improved metheds reporting."