Kernza is a perennial grain that is potentially much easier on the environment than wheat and other annual grains, at least on a per-acre basis. The problem, for now, is that yields are nowhere near wheat yields, so producing an amount of Kernza similar to today’s wheat yields would require around five times as much land. Researchers are working on the problem, but they have been working on it for decades and the progress doesn’t seem to be fast enough for this to be the magic bullet that saves the planet.