While the other hand is happily building Putins pipeline despite almost whole EU opposition https://en.wikipedia.org/wiki/Nord_Stream#Nord_Stream_2
Winters are cold and they don’t want to freeze to death as their grandfathers in 1941 (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.