All the more reason Germany should import wood pellets made in Maine. Eastport, ME has a system to quickly load pellets on to ships.
I heat my top floor with a pellet stove but I caught wind of this "Take THAT Putin!!" lunacy many months ago and planned accordingly - modified my stove to burn crushed olives pits (4 Euros per 15Kg) and bought two small woodstoves as backup. Unlike in Germany, I can drive down to the lake here and get as much free wood as I want. A lot of work though, but it helps me stay in decent shape.