A photo taken with a drone shows a tractor equipped with the prototype of a plant protection robot working on a salad field during the robot's presentation in Galmitz, Switzerland, 01 June 2018. A plant protection robot is currently being developed as part of a pilot project that compared to the conventional method (spray bar) will use 40-70 percent less pesticides. (Photo by Anthony Anex/EPA/EFE/Rex Features/Shutterstock)
