We don't need a climate crisis to tell us we can- and must- do things more cheaply, wisely, and better. As a society we can provide ourselves with prosperity, but only if we take advantage of the economies of scale we can achieve as a society.
These are the economies that, combined with the outright theft of a continent, made us prosperous- a large internal market coupled with large internal resources. Imagine how much of this would have been wasted if those several American states had spent their entire histories making war on each other in European fashion. Now the benefits of size can be turned to big projects, a lucky thing for us, as we have quite a bit to do.
And it's a fortunate thing we don't need climate change tell us what to do, because you can't see it. The "climate" is a statistical construct of events, each of which may with equal justice be totally random. We can see the results, but not the "climate".
So take your best shot. If you think we could save energy by walking to work, flesh out that vision with some good examples or ideas and then tell us. None of us will get exactly what we want, but we can make some real improvements. Don't just sit around and wait for the same people who got us into this mess to come up with a plan for getting us out.