With everybody jumping on the “green” bandwagon, this Physalia concept design will certainly be warmly received. Sure, it’s just a concept design, but it looks really cool, and (according to the design) is able to produce enough energy to sustain itself, not to mention generate a bit more energy to spare too. Named after a species of jellyfish, this vessel will sport a virtual botanical garden, as well as a rooftop garden. With its double membrane photovoltaic solar cells, it can absorb solar energy to propel the ship. When anchored, it’ll use special hydro-turbines to generate energy from the flowing river, turning it into a power plant. If this concept were to make it into the realm of reality, it would certainly be very well received.