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Early morning view (southwest) of particulate/smoke in version on the El Paso, TX USA/Juarez, Mexico border. (a) December, 2004. Arrow at left denotes reference at Asarco stack. R demotes the Rio Grande River. Juarez mountains are in the background. El Paso and Juarez city centers are at left out of view. (b) December, 1998. Arrows marked S show small smoke sources.
