In Arizona, Some Retirees Caught In Never-Ending Battle With Invasive Species

Rather than rest in retirement, a group of volunteers is restoring land in Arizona's Ironwood Forest National Monument to its natural habitat. Their main goal is to eliminate invasive buffelgrass, which is taking over and causing a fire hazard. It's no small task ? they've removed it from the same place 40 times.

Source: http://www.npr.org/2013/01/25/170299272/in-arizona-some-retirees-caught-in-never-ending-battle-with-invasive-species?ft=1&f=1007

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