Human transformation of land threatens future sustainability?

Social and physical scientists have long been concerned about the effects of humans on Earth's surface—in part through deforestation, encroachment of urban areas onto traditionally agricultural lands, and erosion of soils—and the implications these changes have on Earth's ability to provide for an ever-growing population. The December 2012 GSA Today science article presents examples of land transformation by humans and documents some of the effects of these changes.

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