The solution depends on what you think the problem is. Climate change is just that. Not the end of the world. The earth is warming, that's a fact. But regardless of the cause, there doesn't seem to be much we can realistically do about it. So we'll adapt, and humanity will keep growing regardless. The solutions I'm interested in are along the lines of how we'll deal with that. It's an unprecedented area of possible innovation. Anywhere you have a gradient of net energy to a system, growth is inevitable.