A team of researchers led by Dr John Wilmoth of the U.N. Department of Economic and Social Affairs announced yesterday in the journal Science that, according to their estimates, world population, now 7.2 billion, could hit 12.3 billion by 2100. The top panel shows total world population projected to 2100; dotted lines are the range or error using the older scenario method, while shaded regions are the uncertainties using statistical methods; the darker...
