What is the single largest source of dust pollution in the United States? I saw this question on www.howtogeek.com and asked a few friends what they thought. I got answers like concrete factories, coal-fired plants, diesel and gasoline pollution, strip mines, and the Sahara Desert (source of many Cape Verde Hurricanes that threaten the East Coast in Summer). Although all are valid answers, the single largest source, which people from California might know, is the 108 square…