The World's First Moss-Powered City
There are more than 12,000 different types of moss. Not one of 'em is out to kill ya. That makes moss good peeps... 'n soothing to walk on. At least 10,000 of those types are found in Otterberg, Germany. Now that's a lie... but I'm sticking to it. Besides, it feels like there are that many different types in Otterberg. In terms of property ownership, the moss quite literally runs the city.
If a house can power itself using spinach [link], then I think Otterberg should tap into their plentiful moss environment and wire the city that way. The moss wouldn't mind the attention... and the city could claim itself as the first moss-powered city. It'll happen. I can feel it.
The legend says that moss only grows on the north side of a tree. It's cute... but it's wrong. Moss'll grow anywhere that there's water 'n shade. Otterberg is a city of shadows... and water is found almost everywhere. That's why even the sides of the houses in Otterberg have been coated in green layers of moss. While most varieties of moss are found in India and the Amazon, I think it'll be German engineering that takes this species and turns it into a source of energy... and it'll happen in Otterberg.