Several studies in the recent years have focused on the health hazards of chemicals and pesticides used by farmers to protect their crops and improve their yields. Among the cocktail of poison, a controversial herbicide paraquat dichloride, marketed as Gramoxone, is infamous for its link to  accidental poisoning and suicides. Now, researchers have developed a new sensor using nanotechnology that not only detects paraquat, but also estimates its amount. This innovation can help save many innocent lives that grow our food.