The introduction of glyphosate tolerant (GT) crops has been the one of the most significant technological changes in agriculture, along with mechanization and hybrid seed breeding. Farmers around the world are reaping the benefits of a simplified weed control system, saving costs, time and labor and increasing operational flexibility. Adoption has been rapid, particularly in the Americas. In the most important soybean growing US states, Brazil and Argentina around 90% of crops are GT. Globally 148 million ha were sown to GM crops across 29 countries in 2010 of which close to 90 million...