>>2163340lol dude how many people do you think were farming on the north american continent in pre columbian america, certainly less than 10 million people lived there (the few dozen million population number comes from retards extrapolating coastal population density to the whole continent). The dustbowl in the 30s was caused by millions of acres of arid land being cultivated (unprecedented) because of shitty governmental policy, which combined with drought led to massive soil erosion. Cities of 10,000 people in Cahokia and a handful of other places could never have done that. Were they australian aborigines hunting with fire, that would be a different story (desertification)
