Another faculty member who works on environmental policy and technology is Margaret Taylor. Her line of research has lately been about technology push and demand pull policies. She studies how policies can effectively achieve environmental goals through supporting technological innovation.
She works with the climate modeling community as well. It seems that climate and technology modeling becomes important to all environmental policy work.
I'm not sure what the defining differences are between her and Dan Kammen. It seems that they don't work together. I wonder if they have opposing perspectives or there is just no interest overlap.