The United States has more wind energy powering its grid than any other country in the world. Some mistakenly believe that China has become the leading producer of wind energy, surpassing the U.S. in this sector like so many others. It is true that China has more megawatts (MW) of wind turbines installed than the U.S. -- over 90,000 MW to just over 60,000 MW for the US. However, a better measure is the total amount of electricity, measured in kilowatt-hours (kWh), that each country produces from wind and delivers to customers each year. Capacity (MW) measures wind turbine production and installation, but it is the electrical energy (kWh) delivered to the grid that powers our factories, businesses and homes.