Naturally occurring building material is best used in the areas where they occur. Among these are wood, stone, mud or clay, lime and naturally growing grasses like bamboo and straw. All these materials can be used by themselves or in combination with other naturally occurring ones.
A material that is superconductive can store electrical energy without any losses. This can help power stations to store energy effortlessly during hours when the demand is not at a peak, and distribute the stored energy whenever it is needed. Superconductivity can reduce transmission losses to zero
The use of human power instead of machines is quite common in developing and poor countries. While this is immediately apparent in transport such as cycle rickshaws, innovations have allowed the use of pedal power to perform many of the functions that in developed countries are performed by engines.