1) Do we have to give up on fossil fuels entirely, or can sequestration of some sort work? Does solar suffice?
2) Do we have to give up on aviation entirely, or can biofuels work at scale?
3) How fast can carbon be sequestered in soil? Is there a maximum soil inventory? What is it? (This is Dyson’s question.)
4) Can climate models be advanced to the point where deliberate climate modification (“geoengineering”) makes sense?
5) Is there a practical end run around the international “diplomacy” tangle regarding the atmosphere and oceans commons?
6) Given that newly proposed nuclear technologies can process most existing waste for energy, when do we start? How can resistance to this necessary step be overcome?
7) In general how do we prevent new technologies from being introduced before their global implications are understood?
8) Can water shortages be solved by solar-powered desalinization, noting that demand can be scaled to supply and that this is a good use of solar?
9) How urgent is abandoning the idea of perpetual growth? How urgent is abandoning the idea of full employment? Can we avoid the social trauma of these dramatic shifts for a few decades while solving the other problems, or do we need to undertake radical changes right away?
10) Can ocean acidification be reversed at scale? What is the economic substitute good for sushi?
11) How can we facilitate decision making on global questions so that the existence of sound answers to these questions turns into a workable future?
Did I miss any?