Advantages and disadvanteges about windmills

Advantages:

Compared to other energy sources, windmills are very kind to the enviroment. Compared to power stations driven by coal they will save the enviroment for:

• Carbon dioxide (CO2)                          850,0g
• Sulphur dioxide (SO2)                               2,9g
• Nitrogen dioxide (NO2)                            2,6g
• Dust                                                          0,1g
• Cinders, and flying ashes                          55,1g

The brand new windmills are today so competitive on good places, that the use of windmillpower is one of the cheapest methods to reduce the emission of CO2 from the production of electrisity. Windmills have no form of emissions of gases and other harmful substances. 

The wind which tries to press the blade speed a little longer up causes the generator to start  producing power on the net. When the speed of the wind has reached windpower at 13-15 m/s  the mill grants on its maximum at 500 kw for a 500 kw mill.