Iimnw to publishor roprodum tl?o pubhthod form af thh contribu tlon. or to snow othm to do SO, for U.S. Qow,~t pur.-, Tlm Lot Alma Sckntiflc L@boratm rwumtt that thePti. lith@rIdentify thi~qtlcla a work pgrforrmd undw thg qs pica of tho U,S~mmrwnt of Emrgy. Form w 83s ft3 Bt. No. 3s28 13/7s UNITED 9TATC8 DRPARTMSNT OF INRmOV CO@lTHACT W.7400.rtN~, M Thomas, and S. B. Carpenter," A Simplified Technique Used to Evaluate Atmospheric Dispersion of Emissions from Lar@e Power Plants.?'Journal of the Air Pollution Control Association,

Ulth recent changes plovided by the Clean Alr Act Amendment of 1977, the effect of industrial smoke plumes on scenic landscapes assumes heightened importance. The impact of large coal-fired power plants is most easily understood through the use of before-and-after photographs. A technique has been developed to modify a clean "before" scene as dictated by solutions to the radiation tranafer problem in a polluted atmosphere. This allows one to produce simulated "after" scenes, which can illustrate the visual effects of pollutants emitted under a variety of circumstance. Application of this techniquo to very large conlfired power plants suggests that such facilities may impair scenic vistas under some circumstances, unless stricter pollution controls and standards are enforced.

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