#FridaysForFuture I'm a German scientist for future. Very concerned about dangers to coming generations through CO2, nuclear waste, nuclear war, mass extinction. Sustainability dear to my heart since reading "limits to growth" in 1978, never owned a car in my life. #hamradio #AmateurRadio QRP 5W inner city apartment amateur radio station. Enjoy #MorseCode, rag chewing, mining RBN / PSKreporter data, #JS8, low-mountain hiking (#GMA). You can see me at German #AfuBarcamp if you take part in those.