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<br />of silver iodide (AgI) having diameters in the range of 0.01 <br />to 0.1 m. A gram of AgI can be made to produce 1014 such <br />particles, enough to seed several cubic kilometers of cloud. <br />Studies of the direct effect of silver iodide on plant life <br />at Montana State University indicate that with present dosages <br />in use, the effects of silver iodide on plant life would not <br />be detected for 1000 years. At the University of Wyoming, <br />it was found that silver iodide is not toxic to rainbow trout <br />in concentrations likely to occur with cloud seeding activities <br />in the near future. <br /> <br />The main societal concern about cloud seeding is that <br />an adequate explanation of its effects be given to the public <br />before a project is started. This requires that the public <br />have a chance for direct questioning. Hence, the need for <br />public meetings. This is especially true when the target <br />area is an agricultural area where conflicts of interest can <br />exist and need discussion. In addition, the organization <br />of a citizens' advisory committee is a help, as is a public <br />information program. <br /> <br />As a means for avoiding misapplication of the technology <br />by enthusiastic but poorly qualified individuals, or by groups <br />focusing too narrowly on special interest benefits, or in <br />uncontrolled, unmonitored, or overlapping and conflicting <br />projects, there has gradually developed a legal system for <br />controlling the application of the technology. There have <br />also been suits against cloud seeders. The various legal <br />aspects of weather modification are covered in Section 3 entitled <br />"Legal Aspects". <br /> <br />The United States Congress has passed Public Law 92-205 <br />requiring that persons carrying out weather modification activities <br /> <br />3 <br />