They blocked geothermal drilling in the desert. After multiple years of blocking it with use of environmental law they finally managed to preserve it as a conservation area for sustainable tourism:

> Organizers of the Burning Man festival in northwest Nevada have reached a settlement with a geothermal energy developer that cancels an exploratory drilling project that some feared would ruin the ambiance of the counter-culture event.

https://www.eenews.net/articles/burning-man-to-buy-back-geot...

In addition to the sibling comment, I'll say that environmentalists have opposed nuclear energy for half a century, despite it being far better than coal or ng in terms of emissions. I'd say that the venn diagram intersection of burners and opposition to nuclear is significant.