There is more solar energy to pass through the atmosphere, that is, solar energy which reaches the surface of the earth than the annual consumption energy of the world.

Solar optical generation of electricity uses much energy effectively.

After the oil shock in 1973,Solar optical generation of electricity is being researched as an energy in place of the fossil fuel.

The power of the nature is used, and "passive design" is the one that it gets comfortableness by the idea of building own design.

As for "the solar optical generation of electricity system" and "the passive design", let's try to see it.

→What's the solar optical generation of electricity system？
→What's the passive design?