Well I'm not a recycle specialist but when you throw junk in the ocean it's bad, no matter in what shape is it - in a island shape or in the form of a simple garbage. There are whole eco system in the ocean which will be affected by a new island and I doubt this will be a positive impact. People can't play with nature this way. We are talking about protecting the animals and then we put a giant thing on their shelter. And what about undercurrents? These kind of things are job of the nature.