This video is a nice compilation of a range of projects applying robotics to some aspect of agriculture. Thanks to Sam Zimmer for going to the trouble of putting it together!
Robots clean rivers and sort waste, monitor ecosystems, and inspect renewable-energy infrastructure. But even the greenest robot has an environmental footprint.
EPFL engineers have designed acoustic cavities that convert sound waves into thrust, propelling small robots and ultralight aerial vehicles without on-board actuators or electronics.