This summer, biotechnology giant Monsanto has launched a $5 million dollar European ad campaign to promote genetic engineering for crops; a technology that’s widespread in the U.S. but has been mostly kept out of the marketplace of western Europe. The ads, running in French and British newspapers, stress benefits such as higher yields, fewer pesticides, safety and quality control. Commentator John Carroll says the ad campaign could make Europeans grow even warier. John Carroll is a reporter and media critic for WGBH-TV in Boston.