Wind energy is order of the day in Germany and India is not lagging behind. However the constrains are girds which could store the energy when its in excess or when it is not produced due to lack of proper winds. An alternative to this is establishing small generators run on natural gas if its available ( USA) or on biomass in developing world. Another possibility could be using wind energy to generate hydrogen gas which could be fuel for cars for future. Its hypothetical to assume that electrical cars dont produce pollution. Generation of electricity itself is pollution producing process. Recently I had a chance to visit a seniormost Professor in US and he suggested that his father told him 60 years ago. I found this statement to be true even today. The battery a device to store energy has not reached its perfection even today. One can still feel that there is scope to make cleaner and better bettaries and it is one area of research being neglected.