Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The World Wind Energy Association (WWEA) is an international non-profit association representing and uniting the wind power sector worldwide, with members in 90 countries, amongst them the leading national and regional wind energy associations and further members from areas such as manufacturers, suppliers, wind farm developers, NGOs, public bodies, scientific and research institutes as well as individuals. The organisation works for the promotion and worldwide deployment of wind energy technology as a cornerstone of a future energy system fully based on renewable energy.