Girls use slingshots next to a biotech soybean plantation in Avia Terai, in Chaco province, Argentina on May 31. The country’s entire soybean crop and nearly all its corn and cotton have become genetically modified in the 17 years since St. Louis-based Monsanto Company promised huge yields with fewer pesticides using its patented seeds and chemicals. Instead, the agriculture ministry says agrochemical spraying has increased ninefold, from 9 million gallons in 1990 to 84 million gallons today. (Natacha Pisarenko/Associated Press)