What else Germany can do if they shut down and demonized all nuclear energy? Winters are cold and they don’t want to freeze to death as their grandfathers in 1

What else Germany can do if they shut down and demonized all nuclear energy? Winters are cold and they don’t want to freeze to death as their grandfathers in 1941 (https://archive.is/csslJ https://archive.is/csslJ). They can’t burn coal for political reasons (green party), there is no enough solar generation, especially under winter sun, so they burn natural gas, which is cleanest fossil fuel.