If you consider legislation on shipping, there are bound to be costs involved, both direct and indirect. First, given the international nature of this, difficulty in having it uniformly implemented. Second, there are bound to be some level of incremental costs to shipping, Finally, how do you document (demonstrate success)? So, if we were able to get this tackled, what do we have, measurable impact in the North Sea only (or a few other isolated areas)?

It needs to be pointed out, that this would quickly be hoisted on the flagpole of near useless environmental regulation. Quite honestly, the environmental movement needs to pick its battles, for those that are effective, and will demonstrate clear results. Would this proposed legislation deliver that?

So 20% overall, why would we not pursue the largest source (land-based). I believe we there would be likely greater impact on an educational, grass-roots basis to change behavior to decrease land-based pollution, while also helping individuals recognize that their individual efforts are meaningful.