Have you looked into the groups like permaculture, regenerative agriculture, Stamet’s work with mycology, Dr John Todd’s work on ecovats ? The earthship designs? What about the practices Cuba had to adopt when they were under embargo, and could no longer import oil or synthetic fertilizer?
There are a lot of things we can do. There are already solutions that work. People are doing them. They require a shift in how you view the world. By comparison, solar panels and wind turbines are simplistic solutions that do not adequately address these problems.
I am coming to the conclusion that more technology will not solve these problems because the world view and paradigm that spawned these technologies are what lead us here. That rather than viewing the world as if it were mechanisms that can be reduced to isolated, cause-and-effects, and solutions that come from acting upon things in the system through the application of some kind of force, one can see the world as a living system, that is capable of growth of regeneration. This not only includes ecologies and our individual bodies, but also organizations, businesses, communities, and technologies.