What is Wind?

We all know that warm air rises, but how does this scientific fact influence our weather and create those flows of air molecules that we know of as wind? In this episode of SciShow, Hank explains where wind comes from, what factors influence it, and how fast it can go!

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Sources:
http://www.universetoday.com/82329/what-causes-wind/
http://atmo.tamu.edu/weather-and-climate/weather-whys/683-what-causes-wind
http://www.metoffice.gov.uk/learning/wind/what-causes-wind
http://www.iowaenergycenter.org/wind-energy-manual/wind-and-wind-power/what-causes-wind/
http://www.srh.noaa.gov/jetstream//synoptic/wind.htm
http://science.nationalgeographic.com/science/earth/earths-atmosphere/wind/
http://www.atmos.illinois.edu/earths_atmosphere/wind_formation.html
http://www.scientificamerican.com/article.cfm?id=where-does-wind-come-from