Here, technically similar concepts (and TubeWay)
are to be seen and described.
Explanation of our climatic development; and his own prayers.
A bowl of cereal changed the world.
My video at: Tubeway traffic (in YouTube).
Here is a collection of technology-history (and
Here, Christian Himmelstoss and his professional
pupils developed first efficient solar cookers.
Here there are good solar cookers.
Here I was asked for my thermal
module home appeared.
In her magazine my fahrRAD appeared.
Solarkocher as self-construction manual.
Composting furnace for charcoal (good soil).