Not-so-filthy rich

摘要

In the world of mega-yachts, with their multiple sun decks, staterooms, jacuzzis, saunas, cinemas and helicopter-landing pads, there might seem little room left for one-upmanship beyond fitting yet more gold-plated taps and a mini-submarine berth. But the modern fashion for greenness has enabled a number of designers to find something new, in the shape of vessels so clean and self-sufficient they might never need refuelling.