Learn about the science of Wind Power with iMinds insightful audio knowledge series. Wind power is a limitless, non-polluting resource that currently contributes almost 2% of the world's energy supply. It's the fastest-growing resource market in the world and has become one of the biggest issues in the green movement. Importantly, there is enough of it in the atmosphere to meet the daily global energy demand five times over!
But what is wind? In fact, it is the sun's heat and the earth's varied surfaces that create wind. When the sun's rays hit the earth, the north and south poles receive less heat than the equator because of their angle to the sun. The earth's vegetation, water, and geographical features such as mountains and deserts also affect air temperature. These different surface conditions create massive air pockets or "fronts" of varying temperatures. The movement of these fronts is called the "convection system". In this system, warm air starts on the Earth's surface. The hottest air is on or near to the equator.
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