With NYT columnist Nicholas Kristof's seeming endorsement of Roger Pielke Jr.'s ideas about mitigating global warming, it seems that we have two main arguments developing: the "breakthrough" argument, which says we must have technology breakthroughs in order to solve the problem, and, as articulated (for instance) by Joseph Romm, the "just do it" argument that we have the technologies now to minimize global warming. Most of my posts have been an attempt to show how current technologies can move us toward a "zero emissions" society.
The "breakthrough" people do raise an interesting question, but then they veer off into the wrong answer. They ask, effectively, Is there something the government can do to solve global warming, besides carbon pricing? Their answer: Spend $30 billion a year on energy R&D, hoping for a breakthrough.
I will argue in this post that the answer to their question is, Yes, the government can do something beyond carbon pricing -- governments at all levels can, first, provide some of the finance capital to the private sector to build renewable energy systems, and second, governments can build the necessary transportation systems and in some cases the energy systems. And by doing so, support for and the effectiveness of carbon pricing policies will be improved.
In order to make this argument, let's back up a little and ask, "What kind of society are the authors of the various plans for global warming mitigation envisioning?" I think that, at their core, most global warming initiatives embed a conception of what is practical, considering both political and cultural constraints.