Farmers till a newly sprouted corn field in Oaxaca, Mexico. The indigenous Mixteca people in Oaxaca and neighboring states are suffering from the region's severe environmental degradation due to soil erosion. As a consequence, the population of the area is dropping—the state has lost about 18 percent of its population over the years.

The Blue Earth Book has until December 28th to reach its funding goal. For more photography by the photographers featured here, visit the links below or see the BEA website.