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<br />" <br /> <br />CLOUD SEEDING--fourth add <br /> <br />2318 <br /> <br />He noted that enough progress has been made in weather <br />modification that "outstanding legal and environmental researchers <br />have entered the field to do background work." <br />Thus far, environmental researchers "are basically finding <br />that, in the very small quantities of silver iodide being released, <br />there likely will be no effect at all on the environment. In fact, <br />they're finding that the amounts released through cloud seeding <br />are 1,000 times less than occur in normal background--in our litter <br />and in our soils." <br />He said that the research into the legal aspects of weather <br />modification--controlling and monitoring and liability issues--"is <br />almost as extensive as the physical research underway." <br />As to the future, Grant said he feels that the two most <br />important problems facing atmospheric researchers are: determining <br />how far, geographically, the effects of cloud seeding extend, and <br />learning holt to seed summer storms--finding out vlhich clouds can <br />be safely and effectively seeded and how to do it. <br />"Present evidence based on after-the-fact analysis suggests <br />no loss of precipitation in downwind areas from wintertime cloud <br />seeding," Grant stated. "On the contrary, present evidence suggests <br />that precipitation in many cases may have been increased for <br />distances of up to 80 to 150 miles downwind of intended targets...No <br />changes in precipitation, either positive or negative, have been <br />indicated at distances greater than 150 miles." <br />In addition to acting as technical advisers in the emergency <br />weather modification program, atmospheric scientists at CSU are <br />responsible for monitoring of the seeding materials in the <br />atmosphere and snow to assure control over the activities. <br />-more- <br />