Here’s a timely article from Eliza Barclay on a topic close to many Peruvians’ hearts: potatoes. Cover photo from The Potato, Treasure of the Andes  Extreme weather shifts caused by global warming are interrupting millenia-old agricultural cyles in the high Andes, reports Barclay for the Miami Herald. That turmoil is having a devastating effect on crops of native Peruvian potatoes, which grow at altitudes of 3,000+ meters above sea level. Barclay notes in “Peru’s Potato Farmers Adapt to Climate Change” (Sept. 11, 2008): For the first half of his life, Gregorio Huanuco farmed to a rhythm that dictated the survival of his grandparents and ancestors for thousands of years. He waited…