The list below highlights the 13 largest wind farms in the world based on total capacity. Measuring approximately 197 feet long (60 meters), 131 feet wide (40 meters), and 131 feet tall (40 meters), it is by far the largest airborne wind-power generator ever built, according to Beijing SAWES. Wind power has become one of the leading sources of clean energy around the world. Some wind farms now span hundreds of square miles and power millions of homes. The availability and low cost of wind energy and its high efficiency and technological advancements make it one of the most promising. Wind energy is foundational for achieving 100 % renewable electricity production, and significant innovation is required as the grid expands and accommodates hybrid plant systems, energy-intensive products such as fuels, and a transitioning transportation sector. What's driving this growth? Let's take a closer look. What's driving. In two papers — published today in Environmental Research Letters and Joule — Harvard University researchers find that the transition to wind or solar power in the United States would require five to 20 times more land area than previously thought, and if such large-scale wind farms were built.