Windmills are an age-old concept, but what about wind and air-powered cars, watches and skyscrapers? The environmentally-friendly innovations in the slideshow below highlight the variety of ways in which the wind can be harnessed for clean, renewable power.

My favorite wind and air-powered innovations below are the sports cars. Many of them are powered by both the sun and wind—making them perfect for sunny California.

Implications - These 46 wind and air-powered innovations reflect the growing awareness that new forms of sustainable energy are needed to displace the dominance of oil. Renewable energy need not only be used for transportation but also for a range of other every day products.