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Mining for giant profits

Mosaic, the top-performing Fortune 500 stock last year, produces fertilizer -- and in a world of rising food prices, a return to investors that reached 342% last year. Here's an inside look at the company's potash operation in Canada.

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Mosaic's potash mine in Esterhazy, Saskatchewan (Canada).

By Jon Birger, senior writer; photographs by Michael Christopher Brown

Last updated May 01 2008: 7:23 AM ET

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