The price of fossil fuels is increasing at an alarming rate and in addition they will not last forever. In order to tackle the problem it is imperative that we start using the many renewable energy resources provided to us by the Earth. Renewable sources such as solar power, tidal power, wave power and wind power. Wind is everywhere but how do we use it to create power? The concept of wind power goes back for 1000's of years and was used to power boats and of course sail boats are still in use today although generally not on the same scale. Vertical-axis wind mills were used in Persia as water pumps and to grind corn and it is believed that these devices could have been used as early as the 7th century. The wind power we are perhaps more familiar with would be the horizontal-axis windmill, Read more [...]