Can you power a house with a ShakeWeight?

Thanks für bringing up that topic.

In regard of Lenz's law, this reminds me of a cool session with our coolest physics professor (he was from the UK) demonstrating to get a fluorescent lamp glowing in a high-frequency EM field without it being in a socket. Such field generators aren't general purpose and indeed do surely not save power.

Your guess about 35% would be almost right for Germany. I find the figures of 2016 and in regard to electricity, it was 31.5%. In regard to heating (13.1%) and transportation (5.2%), we're also still at low levels. Regenerative electricity percentage grew steadily since Fukushima, and it may play a role our Chancellor Angela Merkel is a physicist that our "Republican" party CDU took a topic of the "Green" party. Of course, protests played a role, too, and it all goes less steady as it may be possible. There still is much dispute about coal and much more to say, there is overall progress, though. In the long term even if energy consumption rises drastically there is a theoretical abundance of solar energy available to harvest in many forms. Even just the tiny amount of sunlight hitting earth has an energy of 1.5 billion TWh per year, whereas the energy consumption worldwide is only 100,000 TWh. That's the figures making me optimisitic about the possibility of 100% regenerative energy coverage.

Just last Sunday a climatologist, Prof. Dr. Anders Levermann was a guest in a two-hour talk (reduced to ~1 hour without music) about climate change (this talk is of course in German, maybe of interest to other German viewers: https://rbbmediapmdp-a.akamaihd.net/content/69c5d0e7-eb0e-481a-9297-d7c8f6a48ae1_a4003784-2d42-46e7-be89-24ea9a239c84.mp3 or search the podcast "radioeins Blaue Stunde"). I don't need to tell the gloomy prospects, as latest US studies also were in the news here.