Environment: The Greening of Arizona

Irene Sturgis, an asthmatic widow from Philadelphia, moved to Tucson, Ariz., 20 years ago on the advice of her doctor. "It was the best thing I ever did," she recalls. "The air was clean and dry, and for the first time in memory I did not have to worry about oxygen bottles and aspirators." Those were the good old days when Tucson's population was 45,000. Now it stands at 263,000, and Mrs. Sturgis, 71, is choking and sneezing again. The reason: the greening of Arizona.

Most of the newcomers who flocked to settle in the state believed that if a desert town...

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