Germany is still the largest producer of lignite, the most damaging type of fossil fuel.
https://dbpedia.org/page/Legnica
I do not know but I will guess that the fossil fuel known as lignite is named after the city of Legnica (Lignitium) in Silesia?
“The Black Triangle”
https://en.wikipedia.org/wiki/Black_Triangle_(region)
Perhaps Elon Musk was also put off Silesia by the Lignite?