Although aerial drones can travel much faster than their underwater counterparts, they certainly aren't as good at gathering water-related data. The MEDUSA multi-rotor drone addresses this conundrum, by landing on the water and deploying an underwater pod.
The construction industry is a big producer of CO2, and ETH Zurich has been working on new techniques that help clean up the industry's act. The result is the HiLo, which was built using minimal concrete and has impressive sustainability features.
The Blue Diversion toilet recently won the title of Most Innovative Project (Europe/West Asia), as bestowed by the International Water Association. So, what makes it so special? Well, for one thing, the same water that flushes it is subsequently used in its hand-washing sink.