Interesting possibilities arise when you combine old technology with new knowledge and new materials, or when you apply old concepts and traditional knowledge to modern technology.
Time for a new age of sail.
The gipsy zeppelin baseship of Lieven Standaert generates its own energy, never has to land, and is equipped with a sun terrace where you can have a coffee.
Oven stoves are greener, more efficient, healthier, safer and cosier than all modern heating systems. Why are they gone and how do we get them back?
Artificial floating islands can be used to clean urban bodies of water. Any polluted canal, river, estuary, lake in a city park, or storm water retention pond would benefit from a floating island.
If we cut the average speed of all vehicles by half, fuel consumption would decrease by a whopping 75 percent.
Replacing tractors with real horse power could be the revolution that agriculture needs.
Downloading cars, houses and aeroplanes is no science fiction.
The newest generation of board games is more fascinating than most computer games.
Energy hungry America teaches the world how to build ecological houses.