Mike Hulme’s new book against geoengineering is going to come out soon and it has already been reviewed in Nature.
I’ve linked to debates between Mike and David Keith before on geoengineering and am looking forward to reading the sustained argument he no doubt makes in this book.
This is especially the case since about a year ago I worked on my first take on the governance aspects of geoengineering with respect to how we imagine our place among other earth systems in the Anthropocene.
That work is set to come out tomorrow as a chapter co-authored with Peter Brown in the annual State of the World report published by Island Press.
the anthropo.scene 
green “nobel” http://www.kqed.org/a/forum/R201404280900