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<br />13 <br /> <br />c. Augmenting precipitation in agricultural areas, <br />either to increase production from present cropping <br />systems or to permit growth of more profitable <br />crops not now adapted to the area. <br /> <br />d. Reduction of hail damage to crops and property. <br /> <br />e. Augmenting precipitation over managed range and <br />forest areas to stabilize or increase production <br />of livestock or wood products. <br /> <br />f. Reducing incidence of lightning-caused forest fires. <br /> <br />g. Aiding in prevention and control of forest fires by <br />stimulating precipitation over dry forests in ad- <br />vance of ignition, or over fires in progress. <br /> <br />h. Increasing snowfall in the immediate. vicinity of <br />commercial ski areas. <br /> <br />(2) By about 1980 <br /> <br />a. Reduction of wind and flood damage from hurricanes <br />and other large tropical storms by lowering their <br />intensity, or, less probably, by "steering" them <br />away from populated areas. <br /> <br />b. Reduction of damage from tornadoes and other severe <br />storms. <br /> <br />c.Reduction in severity of snowstorms over densely pop- <br />ulated regions, such as the Great Lakes shoreline, . <br />and diversion elsewhere (as to the New England-Quebec <br />ski area). <br /> <br />d. "Convenience" control: reduction of rainfall on <br />weekends for the benefit of outdoor recreation, <br />or at other critical times for the construction <br />industry, etc. <br /> <br />= <br /> <br />e. Use of programmed rainfall patterns as an auxiliary <br />tool in control of insect pests. plant diseases:~ <br />and human epidemics. or as an aid in air pollution <br />control. <br /> <br />~ <br /> <br />This is not a forecast that such operations will indeed be lUl.,.. <br />dertaken. The objective of this report is rather to evaluate what <br />is likely to happen to plant and animal commlUlities of interest <br />and value to man if the postulated kinds of planned weather modi- <br />fication should become technologically feasible and economically <br />