Consumer’s Union (an arm of Consumer Reports) says that up to 80 percent of all antibiotics used in the U.S. are administered not to humans, but are given to animals as growth promotants and to prevent disease. But many including the Natural Resources Defense Council and the Consumer’s Union say the overuse of antibiotics in the livestock industry has now led to “superbugs” with greater antibiotic resistance, increasing the risk of untreatable diseases in humans. But how did this come to be? The Natural Resources Defense Council (NRDC) produced the infographic below outlining the history of...