It's obviously kind of ridiculous, but interesting to think about: If we could build habitable places from scratch right now, knowing all that we do about climate change and all that we do about best (or at least better) practices when it comes to renewable energy and urban planning, what would we do? This project promises dense urban areas, solar and wave-powered energy, composting toilets, locally grown agriculture, and so on.
What's more, the island would be built out of the muck already out there polluting the Pacific, which would clean the ocean of the debris and also put that waste to use. Ridiculous, yes. Impossible, probably. But so fun to think about, no?