The Fecuda is a Jaédish invention which is a steam powered road locomotive. It's considered to be the most environmentally friendly vehicle on Terrahypt since it's powered by Light Rods; another Jaédish invention. It emits extreme radiation only in the visible spectrum when being under pressure which then is at temperatures above 100° Celsius.
A Light Rod is a complex carbon crystal where it's molecules vibrate when they're under pressure together, the rod can explode when too much force is being applied, when it does, no dangerous waste are given away. When the exploded rod cools down, all that remains is pure carbon.
There are miniaturized commercial versions of the Fecuda, where the engine makes music.