populationgrowth

Early period of hunter/gatherers. Total population < a few million. Rise of agriculture. Allowed for increase in population density and increase in human population. Industrial revolution. Improvements in medicine, sanitation and agriculture led to rapid increase in population. Today. Rate of growth slow in industrialized nations but high in less developed nations. Earth’s population has doubled several times since Industrial. Revolution. begins. Agriculture. begins. Bubonic. plague. Plowing. and. irrigation.