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<br />000950 <br /> <br />modify the space or time distribution of precipita- <br />tion. Specifically, we find, some evidence foripre- <br /> <br />cipitation increases of as much as 10 or even 20 <br /> <br />percent over areas as large as 1,000 square miles <br /> <br />over periods ranging from weeks to years, Whether <br />cloud seeding produces significant effects far down- <br /> <br />wind of the nominal target area remains open to <br /> <br />question; there are tentative indications of both <br /> <br />increased and decreased rainfall up to 150 miles <br /> <br />beyond the primary target area, Whether appre- <br /> <br />ciable decreases can also be induced by modification <br /> <br />efforts requires careful study, The uncertainties of <br /> <br />cloud seeding are such that we cannot condone-indis- <br /> <br />criminate operational seeding that may destroy oppor- <br /> <br />tunities for significant evaluation; rather, we believe <br /> <br /> <br />that continuing research in both the statistical and <br /> <br />physical aspects is required in order to maintain <br />necessary objectivity. " <br /> <br />One of the Panel's recommendations was: <br /> <br /> <br />"We recommend the early establishment of several <br /> <br /> <br />:~:~::d::~::d~~~:O:::::i:e::::a:::::;nta, ~ <br /> <br />aeedability of a vadety of atoem type,," Iii <br /> <br /> <br /> <br /> <br />9 ~l <br />111~1t<<<i~l't~~lt1fllif~a~rrt~! <br /> <br />