Hector Amezcua/Sacramento Bee Staff Photo

Sara Ryan, a registered nurse with Kaiser in Rancho Cordova, left, instructs patient Debbie Hickman, how to use a Flovent inhaler to help her treat her asthma Monday December 8, 2003. The issue of regulating sources of air pollution is a big issue in the asthma-plagued Sacramento and San Joaquin valleys.

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