MITTENWALD, GERMANY - SEPTEMBER 04: A man and a woman watch goats during a goat drive down the Alps on September 4, 2010 in Mittenwald, Germany. Every year cows, sheep and goats are driven down the mountains in September after they spent about four months on the grazing lands in the Bavarian mountains. (Photo by Alexandra Beier/Getty Images)

Berber women weave traditional carpets in the village of Ait Sghir in the High Atlas region of Morocco February 15, 2015. The snowy foothills of the High Atlas mountains in Morocco are home to several Berber villages where the inhabitants make their living by farming, baking bread in traditional ovens, herding cattle, and the making and selling of honey, olive oil and pottery. Extreme weather fluctuations and erosion that causes flooding and landslides have led to a drop in agricultural productivity, the United Nations said. (Photo by Youssef Boudlal/Reuters)