As an increasing energy source for electricity generation in the world, wind power's share in TPES is less than one percent. However, its contribution to the EU's electricity generation is almost 12.0%. This power source, however, is gaining pace in being adopted as an Alternative Energy Limited. Its benefits are incontrovertible and technological improvements have made wind power increasingly more viable after over twenty years in development.

The world's efforts in harnessing wind energy have been growing at an average annual growth rate of more than 26% since 1990. This is one of the fastest rates of growth among all energy sources. In 2005, total installed wind power capacity grew 24.1% to 59,084 MW from a year ago. In terms of new added capacity, the industry installed 11,531 MW in 2005, which is 40.5% more than the previous year.  The value of these new capacity installations is estimated at  €12.0 billion or US$14.0 billion.

As at end 2005, Europe is still leading in the use of this Alternative Energy Limited, accounting for 68.5% of total global capacity. Germany heads the region and is also the largest wind-powered nation in the world with installed capacity of 18,428 MW. This is 45.5% of the EU's total capacity of 40,504 MW. Spain is the second largest with installed capacity of 10,027 MW. Along with Germany and Spain are the US and several other nations from Asia and Europe in the global top-10 wind-powered leaders. One conspicuous feature of the top-10 wind-powered nations is that their combined installed capacity is 87.6% of the world's total. Notwithstanding, the nations outside of the top-10, while their wind-powered generation capacity is still very small, they are registering the fastest rate of growth over the last four years. Also notable, is China registering the fastest growth of 64.9% for 2005.

The US leads the world with new installed capacity for 2005 with 2,431 MW. That is reported to be able to generate enough electricity for 650,000 homes in the America. Also conspicuous is the top-ten's share, in terms of new capacity, accounting for almost 87.0% of the world's new installations. In fact, the top-four alone commanded 64.5%.