Which led to population growth during the industrial revolution? fewer wars the domestication of animals less pollution the germ theory of disease 18. the negative effects of tilling include improved crop production reduced need for energy input reduced soil drainage increased soil erosion 19. a dramatic decline in the population of europe in the 1300s was caused by the thirty years’ war bubonic plague cholera outbreak potato famine 20. the low population-density of hunter-gather societies allows the environments to deteriorate expand regenerate change 21. quinoa is a historical plant native to asia type of cover crop type of wheat histo