4.1 human pop trends

growth

exponential (j curve)

logistic (s curve)

agricultural revolution

industrial revolution

growth has dropped by 1.2% since 1965

growth unevenly distributed

exponential increase still present

less developed countries have bigger growth

more developed countries have smaller growth

people move from rural to urban areas

mostly in less developed countries

population future projections vary

difficult to predict factors that affect birth rates and death rates

different data sets

growth rate increasing since 1965

more than 50% live in urban areas

many developed nations are stable or declining

currently exponential, by 2050-2100 probably logistic

most populated countries ar China and USA