A cloud of nanoparticles washes through a field. Tiny sensors gather data on variants in air current, moisture and temperature. The pH balance of the water and the soil is constantly monitored and the growth rate, health and sustainability of the crop is continually assessed. The dust of nanoparticles—some may call it smart dust—can detect invaders in the field, be it a disease infecting the crop, small animals or humans and dispatch another cloud of dust to combat the threat.
Smart Dust may seem like idea out of science fiction, but the technology behind the concept is very real. In fact, DARPA started doing tests on the concept of Smart Dust in the early 1990s.