Lime burning is a now-forgotten industry that sustained many agrarian communities before energy became cheap.
Modern research, which combines ancient knowledge with fast computing techniques, shows that passive solar cities are a realistic option, allowing for surprisingly high population densities.
The only advantage that fossil-fuelled powered cranes have brought us, is a higher lifting speed
Depending on the size of the kiln, it took between one and six weeks for the fire to complete a full circle.
The craftsmanship associated with timbrel vaulting has long vanished, but the achievements are still with us today.
LEDs introduce lighting in places and situations where there was no lighting before.
Energy hungry America teaches the world how to build ecological houses.