Engineer Graham Brodie developed the microwave weed-killing machine. Kitchen microwave ovens are routinely used to “zap” our food. They can heat leftover pizza or cook dinner in minutes. The same technology is being tested in Australia as a chemical-free way to control weeds. An engineer at the University of Melbourne in Australia has developed an operational prototype weed-killing machine. The prototype, mounted on the back of a tractor, covers a width of 6.5 feet and uses two microwave generators to direct the radio waves at ground level to kill weeds and weed seeds. Dr. Graham Brodie, who’s behind the weed-killing […]